improve pre-commit run on GHA

[pmeier]

The comment

nebari/.github/workflows/run-precommit.yaml

Lines 22 to 23 in ac981ea

	# https://github.com/pre-commit/action to enable cache
	- uses: pre-commit/action@v3.0.0

is not the full picture. The action also installs pre-commit and runs it against all files by default. Meaning, we are currently installing pre-commit for nothing

nebari/.github/workflows/run-precommit.yaml

Lines 25 to 26 in ac981ea

	- name: Install pre-commit 📦
	run: pip install pre-commit

and running the terraform_fmt hook twice:

nebari/.github/workflows/run-precommit.yaml

Lines 28 to 29 in ac981ea

	- name: Run terraform pre-commit ⚡️
	run: pre-commit run terraform_fmt

This PR improves this by only running the terraform_fmt hook through the action.

[pmeier]

1c2ba6b demonstrates that we still catch formatting issues.