feat(py_test): Allows passing tags to generated py_pytest_main.

[ElanHR]

Passing tags to py_pytest_main allows them to be excluded from mypy type checking.

Current implementation of pytest-generated code does not adhere to strict type safety and gives the following mypy errors:

bazel-out/.../my_test.pytest_main.py:37: error: Argument 1 to "open" has incompatible type "str | None"; expected "int | str | bytes | PathLike[str] | PathLike[bytes]"  [arg-type]
bazel-out/.../my_test.pytest_main.py:78: error: Argument 1 to "int" has incompatible type "str | None"; expected "str | Buffer | SupportsInt | SupportsIndex | SupportsTrunc"  [arg-type]
bazel-out/.../my_test.pytest_main.py:84: error: Argument 1 to "Path" has incompatible type "str | None"; expected "str | PathLike[str]"  [arg-type]
bazel-out/.../my_test.pytest_main.py:109: error: Unsupported left operand type for + ("None")  [operator]
bazel-out/.../my_test.pytest_main.py:109: note: Left operand is of type "str | None"
bazel-out/.../my_test.pytest_main.py:114: error: Argument 1 to "open" has incompatible type "str | None"; expected "int | str | bytes | PathLike[str] | PathLike[bytes]"  [arg-type]

The current workaround to exclude these tests via tags however these are not currently passed to generated py_pytest_main.

---

Changes are visible to end-users: yes

• Searched for relevant documentation and updated as needed: yes
• Breaking change (forces users to change their own code or config): no
• Suggested release notes appear below: yes

Enables py_test tags passing to generated py_pytest_main

Test plan

Build/Unit tests

bazel build //...
bazel test //...

• Manual testing; please provide instructions so we can reproduce:

tools/aspects.bzl:

load("@pip_types//:types.bzl", "types")
load("@rules_mypy//mypy:mypy.bzl", "mypy")

mypy_aspect = mypy(
	mypy_ini = "@@//:mypy.ini",
	types = types,
	suppression_tags = ["no-mypy", "no-checks"],
)

...<path_to_my_test>/BUILD.bazel:

py_test (
  name = "my_test",
  srcs = ["my_test.py"],
  pytest_main = True,
  deps = [
     ...
  ],
  tags = ["no-mypy"],
)

No mypy errors are raised.

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[aspect-workflows]

Test

1 test target passed

Targets

//docs:update_2_test [k8-fastbuild]                 80ms

Total test execution time was 80ms. 38 tests (97.4%) were fully cached saving 1m 9s.

[arrdem]

Is this required with #577? In general I'm not convinced there's correct behavior for macros to pass tags down to the other rules/macros they invoke, so this feels like the wrong approach to me.