Full examples for CMEK examples

[wiktorn]

Fix E2E tests by ensuring that necessary resources already exists.

For CMEK examples - make them fully verbose and end-to-end.

For some, still explicit depends_on is required:

• cloud functions require additional grants to actually work with default service account, I'm considering moving this grant to setup_module

This is alternate fix to the one proposed in #2524.

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Checklist

I applicable, I acknowledge that I have:

• Read the contributing guide
• Ran terraform fmt on all modified files
• Regenerated the relevant README.md files using tools/tfdoc.py
• Made sure all relevant tests pass

[wiktorn]

@juliocc Can you take a look at modules/alloydb here before I move forward with all other modules?

[wiktorn]

E2E run

[juliocc]

@juliocc Can you take a look at modules/alloydb here before I move forward with all other modules?

This looks much better.

[wiktorn]

I think this is as good as it gets. I split changes into two commits - one adding dependencies in outputs in modules, and the other fixing the tests themselves.

Ready for thorough review

[juliocc]

<3