Fixed some missing digests and addressed other warnings

[UebelAndre]

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

When building these rules, there's currently a large list of warnings coming from various things within the workspace.

(23:38:49) DEBUG: Rule 'ubuntu1604' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "eb50020790e22538676e17c0242b9272bdb5c81f7bc6b128a4abfa7ad31faf5b"
(23:38:49) DEBUG: Repository ubuntu1604 instantiated at:
  /workdir/WORKSPACE:226:13: in <toplevel>
Repository rule http_archive defined at:
  /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/ec321eb2cc2d0f8f91b676b6d4c66c29/external/bazel_tools/tools/build_defs/repo/http.bzl:336:31: in <toplevel>
(23:38:49) DEBUG: Rule 'debian9' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "eb50020790e22538676e17c0242b9272bdb5c81f7bc6b128a4abfa7ad31faf5b"
(23:38:49) DEBUG: Repository debian9 instantiated at:
  /workdir/WORKSPACE:232:13: in <toplevel>
Repository rule http_archive defined at:
  /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/ec321eb2cc2d0f8f91b676b6d4c66c29/external/bazel_tools/tools/build_defs/repo/http.bzl:336:31: in <toplevel>
(23:38:49) DEBUG: /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/ec321eb2cc2d0f8f91b676b6d4c66c29/external/npm/install_bazel_dependencies.bzl:5:14:
NOTICE: install_bazel_dependencies is no longer needed,
since @bazel/* npm packages can be load()ed without copying to another repository.
See https://github.com/bazelbuild/rules_nodejs/issues/1877
 
install_bazel_dependencies is harmful because it causes npm_install/yarn_install to run even
if the requested output artifacts for the build don't require nodejs, making multi-language monorepo
use cases slower.
 
You should be able to remove install_bazel_workspaces from your WORKSPACE file unless you depend
on a package that exposes a separate repository, like @angular/bazel exposes @npm_angular_bazel//:index.bzl
 
You can suppress this message by passing "suppress_warning = True" to install_bazel_dependencies()
(23:38:49) DEBUG: /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/ec321eb2cc2d0f8f91b676b6d4c66c29/external/bazel_toolchains/rules/rbe_repo/version_check.bzl:68:14:
Current running Bazel is ahead of bazel-toolchains repo. Please update your pin to bazel-toolchains repo in your WORKSPACE file.
(23:38:49) DEBUG: /var/lib/buildkite-agent/.cache/bazel/_bazel_buildkite-agent/ec321eb2cc2d0f8f91b676b6d4c66c29/external/bazel_toolchains/rules/rbe_repo/checked_in.bzl:125:14: buildkite_config not using checked in configs; Bazel version 4.0.0 was picked/selected but no checked in config was found in map {"0.20.0": ["8.0.0"], "0.21.0": ["8.0.0"], "0.22.0": ["8.0.0", "9.0.0"], "0.23.0": ["8.0.0", "9.0.0"], "0.23.1": ["8.0.0", "9.0.0"], "0.23.2": ["9.0.0"], "0.24.0": ["9.0.0"], "0.24.1": ["9.0.0"], "0.25.0": ["9.0.0"], "0.25.1": ["9.0.0"], "0.25.2": ["9.0.0"], "0.26.0": ["9.0.0"], "0.26.1": ["9.0.0"], "0.27.0": ["9.0.0"], "0.27.1": ["9.0.0"], "0.28.0": ["9.0.0"], "0.28.1": ["9.0.0"], "0.29.0": ["9.0.0"], "0.29.1": ["9.0.0", "10.0.0"], "1.0.0": ["9.0.0", "10.0.0"], "1.0.1": ["10.0.0"], "1.1.0": ["10.0.0"], "1.2.0": ["10.0.0"], "1.2.1": ["10.0.0"], "2.0.0": ["10.0.0"], "2.1.0": ["10.0.0"], "2.1.1": ["10.0.0", "11.0.0"], "2.2.0": ["11.0.0"], "3.0.0": ["11.0.0"], "3.1.0": ["11.0.0"], "3.2.0": ["11.0.0"], "3.3.0": ["11.0.0"], "3.3.1": ["11.0.0"], "3.4.1": ["11.0.0"], "3.5.0": ["11.0.0"]}
(23:38:50) DEBUG: Rule 'k8s_pause_arm64' indicated that a canonical reproducible form can be obtained by modifying arguments digest = "sha256:f365626a556e58189fc21d099fc64603db0f440bff07f77c740989515c544a39"
(23:38:50) DEBUG: Repository k8s_pause_arm64 instantiated at:
  /workdir/WORKSPACE:149:15: in <toplevel>
Repository rule container_pull defined at:
  /workdir/container/pull.bzl:243:33: in <toplevel>
(23:38:51) DEBUG: Rule 'alpine_linux_armv6_tar' indicated that a canonical reproducible form can be obtained by modifying arguments digest = "sha256:dabea2944dcc2b86482b4f0b0fb62da80e0673e900c46c0e03b45919881a5d84"
(23:38:51) DEBUG: Repository alpine_linux_armv6_tar instantiated at:
  /workdir/WORKSPACE:61:15: in <toplevel>
Repository rule container_pull defined at:
  /workdir/container/pull.bzl:243:33: in <toplevel>
(23:38:53) DEBUG: Rule 'alpine_linux_ppc64le' indicated that a canonical reproducible form can be obtained by modifying arguments digest = "sha256:402d21757a03a114d273bbe372fa4b9eca567e8b6c332fa7ebf982b902207242"
(23:38:53) DEBUG: Repository alpine_linux_ppc64le instantiated at:
  /workdir/WORKSPACE:141:15: in <toplevel>
Repository rule container_pull defined at:
  /workdir/container/pull.bzl:243:33: in <toplevel>
(23:38:54) DEBUG: Rule 'alpine_linux_amd64' indicated that a canonical reproducible form can be obtained by modifying arguments digest = "sha256:954b378c375d852eb3c63ab88978f640b4348b01c1b3456a024a81536dafbbf4"
(23:38:54) DEBUG: Repository alpine_linux_amd64 instantiated at:
  /workdir/WORKSPACE:124:15: in <toplevel>
Repository rule container_pull defined at:
  /workdir/container/pull.bzl:243:33: in <toplevel>
(23:38:54) DEBUG: Rule 'distroless_base' indicated that a canonical reproducible form can be obtained by modifying arguments digest = "sha256:75f63d4edd703030d4312dc7528a349ca34d48bec7bd754652b2d47e5a0b7873"
(23:38:54) DEBUG: Repository distroless_base instantiated at:
  /workdir/WORKSPACE:93:15: in <toplevel>
Repository rule container_pull defined at:
  /workdir/container/pull.bzl:243:33: in <toplevel>
(23:38:57) DEBUG: Rule 'distroless_cc' indicated that a canonical reproducible form can be obtained by modifying arguments digest = "sha256:c33fbcd3f924892f2177792bebc11f7a7e88ccbc247f0d0a01a812692259503a"
(23:38:57) DEBUG: Repository distroless_cc instantiated at:
  /workdir/WORKSPACE:99:15: in <toplevel>
Repository rule container_pull defined at:
  /workdir/container/pull.bzl:243:33: in <toplevel>

These should be addressed to improve caching and avoid potential future breakages.

What is the new behavior?

The issues above have been addressed

Does this PR introduce a breaking change?

• Yes
• No

Other information