Remove leftover actions/checkout configuration for branches & tags

[viccuad]

We have usage of actions/checkout with the following comment:

github-actions/.github/workflows/reusable-release-policy-assemblyscript.yml

Lines 23 to 26 in 20f3f42

	- uses: actions/checkout@v4
	with:
	# until https://github.com/actions/checkout/pull/579 is released
	fetch-depth: 0

We may be able to remove this configuration in some cases. In others, we may need to configure actions/checkout differently, or equally. Nevertheless, our comment should be removed.

Acceptance criteria

Evaluate if if we can connfigure actions/checkout to checkout branches or tags as needed.
Test the behaviour for normal policies (Rust, Go, Wasi, Rego) and monorepo policies.