ci: add internal library dependency pin updates to bump script and co…

[a-klos]

This pull request enhances the dependency version bumping script to ensure that internal library dependencies are automatically kept in sync when bumping versions. It introduces new logic to update dependency pins for internal libraries, and adds comprehensive tests to verify this behavior.

Dependency management improvements:

• Added a LIB_DEP_PINS mapping in bump_pyproject_deps.py to specify which internal library dependencies should be updated to match the new version during a bump.
• Updated the bump function to iterate over LIB_DEP_PINS and update the specified dependency pins in each relevant pyproject.toml file when bumping library versions.

Testing enhancements:

• Added a new test, test_bump_updates_internal_lib_dependency_pins, in test_bump_pyproject_deps.py to verify that internal library dependency pins are correctly updated alongside the library version.
• Introduced helper imports and functions in the test file to support the new test logic.