Add rules_python 0.37.2 for Bazel 7

Adding a newer `rules_python` to `rules_magic_deps` _before_
`rules_proto` fixes the missing `rules_python` file error from the
previous commit.

rules_python 0.37.2 is the last version that doesn't pull in its own
`protobuf`. `rules_python` 0.38.0 pulls in protobuf v27 unconditionally.
0.37.2 allows us to keep using rules_proto-5.3.0-21.7 for now.

Also, `rules_python` 0.40.0 and later require newer `rules_cc` versions
that may not play nice with `protobuf` v21.7. After we upgrade
`protobuf` to a more recent version, we can upgrade to more recent
`rules_python` version. For details:

- bazel-contrib/rules_scala#1660 (comment)

The build now produces the following failure:

```txt
ERROR: external/remote_java_tools_darwin_arm64/BUILD:
  no such target
  '@@remote_java_tools_darwin_arm64//:turbine_direct_graal':
  target 'turbine_direct_graal' not declared in package ''
  defined by external/remote_java_tools_darwin_arm64/BUILD

ERROR: external/rules_java_builtin/toolchains/BUILD:163:14:
  no such target
  '@@remote_java_tools_darwin_arm64//:turbine_direct_graal':
  target 'turbine_direct_graal' not declared in package ''
  defined by external/remote_java_tools_darwin_arm64/BUILD
  and referenced by
  '@@rules_java_builtin//toolchains:turbine_direct_graal_darwin_arm64'

ERROR: Analysis of target '//:default-values' failed; build aborted:
  Analysis failed
```

Another `rules_java_builtin` and user-declared `rules_java` conflict due
to the legacy `WORKSPACE` model:

- `rules_java` 7.3.0 introduced the `turbine_direct_graal` target into its
  `//toolchains` package via:

  bazelbuild/rules_java#151: Use Turbine native image as
  `header_compiler_direct`
  bazelbuild/rules_java@d5b3ecf

- As noted in "Bump to Bazel 7.6.2", the legacy `WORKSPACE` prefix
  creates `@rules_java_builtin`, which is actually `rules_java` 7.6.5.
  This version depends on `remote_java_tools` v13.6.1, whose repos
  contain `//:turbine_direct_graal`. Its `README.md` shows that it
  comes from bazelbuild/bazel@40ec2cd.

  https://github.com/bazelbuild/rules_java/blob/7.6.5/java/repositories.bzl#L25
  https://github.com/bazelbuild/java_tools/releases/download/java_13.6.1/java_tools_darwin_arm64-v13.6.1.zip
  https://github.com/bazelbuild/bazel/blob/40ec2cd1a15d73473945475552ad1d0cb6d77927/tools/jdk/BUILD.java_tools_prebuilt#L26-L32

- The legacy `bootcamp/WORKSPACE` file invokes `rules_java_dependencies`
  from `rules_java` 6.5.2, instantiating `remote_java_tools` v12.6,
  whose repos do _not_ contain `//:turbine_direct_graal`. It comes from
  bazelbuild/bazel@bd91cb1.

  https://github.com/bazelbuild/rules_java/blob/6.5.2/java/repositories.bzl#L31
  https://github.com/bazelbuild/java_tools/releases/download/java_v12.6/java_tools_darwin_arm64-v12.6.zip
  https://github.com/bazelbuild/bazel/blob/bd91cb131785a6693d45c7840a229d345e48d40b/tools/jdk/BUILD.java_tools_prebuilt

- The legacy `WORKSPACE` suffix invokes `rules_java_dependencies` from
  `rules_java` 7.6.5. Since it wraps the `http_archive` repo rules
  instantiating `remote_java_tools` repos with `maybe`, nothing happens,
  because the repos already exist.

- The legacy `WORKSPACE` suffix then invokes `rules_java_toolchains`
  from `rules_java` 7.6.5, which registers `//toolchains:all`.

- That version of the `//toolchains` package aliases
  `"turbine_direct_graal_%s" % OS` to
  `"@remote_java_tools_%s//:turbine_direct_graal" % OS`.

  https://github.com/bazelbuild/rules_java/blob/7.6.5/toolchains/BUILD#L163-L166

- Since the `"@remote_java_tools_%s" % OS` repo doesn't contain a
  `turbine_direct_graal` target, analysis of `//toolchains:all` breaks.

---

Another solution would've been to apply the following patch to remove
`rules_proto` as a dependency and rely only on `com_google_protobuf`.
However, we'll keep `rules_proto` to illustrate a different upgrade path
prior to depending on `com_google_protobuf` directly.

```diff
diff --git i/bootcamp/WORKSPACE w/bootcamp/WORKSPACE
index 3e7a614..0b13a55 100644
--- i/bootcamp/WORKSPACE
+++ w/bootcamp/WORKSPACE
@@ -24,15 +24,6 @@ load(
 rules_java_dependencies()
 rules_java_toolchains()

-load(
-    "@rules_proto//proto:repositories.bzl",
-    "rules_proto_dependencies",
-    "rules_proto_toolchains",
-)
-
-rules_proto_dependencies()
-rules_proto_toolchains()
-
 load("@com_frobozz_rules_magic//magic:config.bzl", "magic_config")

 magic_config(
diff --git i/rules_magic/magic/deps.bzl w/rules_magic/magic/deps.bzl
index 984e8ae..23b64af 100644
--- i/rules_magic/magic/deps.bzl
+++ w/rules_magic/magic/deps.bzl
@@ -15,11 +15,9 @@ def rules_magic_deps():

     maybe(
         http_archive,
-        name = "rules_proto",
-        sha256 = "dc3fb206a2cb3441b485eb1e423165b231235a1ea9b031b4433cf7bc1fa460dd",
-        strip_prefix = "rules_proto-5.3.0-21.7",
+        name = "com_google_protobuf",
         urls = [
-            "https://mirror.bazel.build/github.com/bazelbuild/rules_proto/archive/refs/tags/5.3.0-21.7.tar.gz",
-            "https://github.com/bazelbuild/rules_proto/archive/refs/tags/5.3.0-21.7.tar.gz",
+            "https://github.com/protocolbuffers/protobuf/releases/download/v21.7/protobuf-all-21.7.zip",
         ],
+        sha256 = "5493a21f5ed3fc502e66fec6b9449c06a551ced63002fa48903c40dfa8de7a4a",
     )
```

Author: mbland

bootcamp/WORKSPACE

@@ -15,6 +15,10 @@ load(
 rules_magic_deps()
 rules_magic_leaflet_repo()
 
+load("@rules_python//python:repositories.bzl", "py_repositories")
+
+py_repositories()
+
 load(
     "@rules_java//java:repositories.bzl",
     "rules_java_dependencies",

rules_magic/WORKSPACE

@@ -8,6 +8,10 @@ load(
 
 rules_magic_deps()
 
+load("@rules_python//python:repositories.bzl", "py_repositories")
+
+py_repositories()
+
 load(
     "@rules_java//java:repositories.bzl",
     "rules_java_dependencies",

rules_magic/magic/deps.bzl

@@ -23,3 +23,11 @@ def rules_magic_deps():
             "https://github.com/bazelbuild/rules_proto/archive/refs/tags/5.3.0-21.7.tar.gz",
         ],
     )
+
+    maybe(
+        http_archive,
+        name = "rules_python",
+        sha256 = "c6fb25d0ba0246f6d5bd820dd0b2e66b339ccc510242fd4956b9a639b548d113",
+        strip_prefix = "rules_python-0.37.2",
+        url = "https://github.com/bazelbuild/rules_python/releases/download/0.37.2/rules_python-0.37.2.tar.gz",
+    )