test: improvements to requester pays tests and bucket metadata updates

[ddelgrosso1]

Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:

• [ ] Make sure to open an issue as a bug/issue before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea
• [ ] Ensure the tests and linter pass
• [ ] Code coverage does not decrease (if any source code was changed)
• [ ] Appropriate docs were updated (if necessary)

Fixes #2329 🦕 Fixes #2332 Fixes #2404 Fixes #2405 Fixes #2406 Fixes #2409

[ddelgrosso1]

Forgive my kokoro spam, trying to test in the CI environment vs locally as differences exist.