build: add pyinstaller hook for googleapiclient

[0x2b3bfa0]

The Google API Discovery Service JSON files from googleapiclient/discovery_cache/documents were being excluded due to a bug and, particularly, drive.v2.json is essential for our gdrive backend. Now we're explicitly asking PyInstaller to embed these files on the generated packages. (Fixes #5618)

• ❗ I have followed the Contributing to DVC checklist.

[0x2b3bfa0]

scripts/hooks/hook-googleapiclient.model.py:2:0: E0401: Unable to import 'PyInstaller.utils.hooks' (import-error)

It looks like Vigil could be a more appropriate language for this linter.

[pmrowla]

@0x2b3bfa0 There's a new linter issue - imports should be on separate lines (my mistake). You should set up our pre-commit hooks so this shows up in your environment though (along with things like the original pylint issue) https://dvc.org/doc/user-guide/contributing/core#development-environment

[0x2b3bfa0]

🙏 Thank you again, @pmrowla! This time, failed checks don't have anything to do with my pre-commit laziness. 🙃

dvc/tests/func/test_scm.py

Lines 246 to 248 in 6ac7def

	# libgit2 stash_save() is flaky on linux when run inside pytest, see:
	# https://github.com/iterative/dvc/pull/5286#issuecomment-792574294
	@flaky(max_runs=5, min_passes=1)

[efiop]

Thank you! 🙏