chore: Include PRs to all branches in automated tests

[p-offtermatt]

Description

Closes: NA

Enables automated tests for all PRs to each branch.
Right now, automated tests run only on PRs targetted to feat/, release/v, and main.
I don't see a reason for this, but in more complicated scenarios (like a PR to a PR to a feature branch), the current behaviour doesn't run tests.

Please lmk if the current behaviour is a safeguard against anything specific - I think there are few PRs that don't run automated tests under the current behaviour anyways

Here is a list of past PRs of the last 6 months that were not eligible for running automated tests under the current config, but are eligible under the changed config (19 prs):
https://github.com/cosmos/interchain-security/pulls?q=is%3Apr+-base%3Amain+-base%3Arelease+-base%3Afeat+created%3A%3E2023-03-17

To compare, the full list of PRs in that period (344 prs):
https://github.com/cosmos/interchain-security/pulls?q=is%3Apr+created%3A%3E2023-03-17+

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Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.

I have...

• Included the correct type prefix in the PR title
• Targeted the correct branch (see PR Targeting)
• Provided a link to the relevant issue or specification
• Reviewed "Files changed" and left comments if necessary
• Confirmed all CI checks have passed

Reviewers Checklist

All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.

I have...

• Confirmed the correct type prefix in the PR title
• Confirmed all author checklist items have been addressed
• Confirmed that this PR does not change production code

[shaspitz]

I support this idea! Don't have context on the bill tho :P

[p-offtermatt]

Since this doesn't seem very necessary and some people might specifically use branches like this to not run unnecessary CI tests, I'll close this

[MSalopek]

Closing as decayed. We can reopen at a later time.