chore: adds a TF testing workflow + changes renovate schedule

[Gowiem]

what

• Adds a tf-test workflow for running terraform + tofu tests

why

• This will ensure we're always running tests on each PR to make sure we don't break anything

references

• N/A

[oycyc]

This is awesome!! This automation module's potential is so much.

[oycyc]

When reading through this, I was wondering if we should use GitHub Action with the matrix strategy to make it more DRY: https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/running-variations-of-jobs-in-a-workflow#using-a-matrix-strategy

We could replace any usage of terraform or tofu with something like ${{ matrix.tooling }}.

But also at the same time, we're just maintaining these two so it doesn't really matter to make it super optimized.

[Gowiem]

Trying this out!

[Gowiem]

Working and I like it 👍 We can break it up in the future if terraform + tofu decide to diverge in some way that makes this difficult

[oycyc]

Yep!

[oycyc]

Matrix is nice

[spacelift-masterpointio]

⚠️Spacelift Stack Failure⚠️

@Gowiem - This pull request was deployed and the following Spacelift stack failed:

• ⛔️ spacelift-automation-example - view the run here ⛔️