Roll out actionlint everywhere.

[sengi]

We use GitHub Actions for a lot of important stuff and all(?) of our config for it is YAML. GHA's YAML interface is full of gotchas and footcannons, so a decent linter is a no-brainer.

We want actionlint to be a mandatory pre-merge check on all GOV.UK repos that use GitHub Actions.

Tasks

Beta Give feedback

1. Run actionlint static checker pre-merge. #1312
   +0
   
2. Add Action Linting and Ruby 3.3.3 account-api#931
   enhancement github_actions +2
3. Actionlint for Collections collections#3758
   +0
   
4. Add Actionlint, upgrade to Ruby 3.3.4 asset-manager#1468
   enhancement github_actions +2
   
5. Add GH Action Linting check collections-publisher#2296
   enhancement +1
6. Add Action Linting to Content Tagger content-tagger#1824
   +0