[Merged by Bors] - refactor(zulip-emoji-merge-delegate.py): consolidate repeated logic

[grunweg]

This script repeats the same logic for all ~5 different emojis now: extract the logic into short functions to make the code shorter.

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Commits are best reviewed individually.

• depends on: [Merged by Bors] - feat(CI): add emoji to maintainer merge'd PRs also #24544

[github-actions]

PR summary f17197c039

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

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Declarations diff

No declarations were harmed in the making of this PR! 🐙

You can run this locally as follows

## summary with just the declaration names:
./scripts/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for script/declarations_diff.sh contains some details about this script.

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No changes to technical debt.

You can run this locally as

./scripts/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

[mathlib4-dependent-issues-bot]

This PR/issue depends on:

• [Merged by Bors] - feat(CI): add emoji to maintainer merge'd PRs also #24544
  By Dependent Issues (🤖). Happy coding!

[bryangingechen]

Not sure from the discussion in Zulip if this is still being tested but LGTM.
bors d+

[mathlib-bors]

✌️ grunweg can now approve this pull request. To approve and merge a pull request, simply reply with bors r+. More detailed instructions are available here.

[grunweg]

I would say: yes, this is being tested - but the logic change is orthogonal to this refactoring, so let's land this first. Thanks for the quick review!
bors r+

[mathlib-bors]

Pull request successfully merged into master.

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