Check change log in tag script

[newhoggy]

Description

This script is used to tag components in a way that sanity checks various items before a tag is created and pushed.

To tag a new version of a component, the cabal file's version must first be modified committed and pushed.

The script checks if:

• The commit has been pushed to the remote
• The tag doesn't already exist
• The tag hasn't already been pushed

This PR adds an additional check: The change log for the relevant component must have a section for the version being release.

Changelog

- description: |
    Check change log in tag script
  compatibility: no-api-changes
  type: maintenance

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• The change log section in the PR description has been filled in
• New tests are added if needed and existing tests are updated. These may include:
  • golden tests
  • property tests
  • roundtrip tests
  • integration tests
    See Runnings tests for more details
• Any changes are noted in the CHANGELOG.md for affected package
• The version bounds in .cabal files are updated
• CI passes. See note on CI. The following CI checks are required:
  • Code is linted with hlint. See .github/workflows/check-hlint.yml to get the hlint version
  • Code is formatted with stylish-haskell. See .github/workflows/stylish-haskell.yml to get the stylish-haskell version
  • Code builds on Linux, MacOS and Windows for ghc-8.10.7 and ghc-9.2.7
• Self-reviewed the diff

Note on CI

If your PR is from a fork, the necessary CI jobs won't trigger automatically for security reasons.
You will need to get someone with write privileges. Please contact IOG node developers to do this
for you.

[carbolymer]

Can you add a brief description (to the file) what does this script do?

[newhoggy]

Description updated with more information.

[carbolymer]

Useless use of cat in line 16.

[newhoggy]

I normally write code this way to structure it as a pipeline so that I can easily add a new proceses to the pipeline anywhere if necessary.

[Jimbo4350]

LGTM