tests: make analysis tests support --incompatible_enable_cc_toolchain_resolution

[comius]

The analysis tests transition to different platforms to test some platform-specific logic.

When cc toolchain registration is enabled, this also requires that a more complete
toolchain be defined and available.

[chrislovecnm]

Buildifier is spotting errors:

tools/build_defs/python/tests/py_test/py_test_tests.bzl:56:13: unsorted-dict-items: Dictionary items are out of their lexicographical order.
--
  | tools/build_defs/python/tests/py_test/py_test_tests.bzl:88:13: unsorted-dict-items: Dictionary items are out of their lexicographical order.

[comius]

Buildifier is spotting errors:

[tools/build_defs/python/tests/py_test/py_test_tests.bzl:56:13](https://github.com/comius/rules_python/blob/c5034d2fc59c38c13ad218ac021ab052e7137733/tools/build_defs/python/tests/py_test/py_test_tests.bzl#L56): [unsorted-dict-items](https://github.com/bazelbuild/buildtools/blob/master/WARNINGS.md#unsorted-dict-items): Dictionary items are out of their lexicographical order.
--
  | [tools/build_defs/python/tests/py_test/py_test_tests.bzl:88:13](https://github.com/comius/rules_python/blob/c5034d2fc59c38c13ad218ac021ab052e7137733/tools/build_defs/python/tests/py_test/py_test_tests.bzl#L88): [unsorted-dict-items](https://github.com/bazelbuild/buildtools/blob/master/WARNINGS.md#unsorted-dict-items): Dictionary items are out of their lexicographical order.

Fixed.

[chrislovecnm]

If you can push an empty commit, we had a CI flake

[chrislovecnm]

@rickeylev, @f0rmiga or @alexeagle PTAL. This is a little above my knowledge of bazel.

[rickeylev]

for posterity: this just affects some analysis tests of the base rules. They forcibly transition their targets to other platforms, and need some extra fake toolchain stuff defined to work.