feat: TryThis suggestion for the mergeWithGrind linter

[chenson2018]

This PR changes the mergeWithGrind linter to provide a TryThis suggestion. The same message is provided as the currently logged warning, and should still be processed properly by zulip_build_report.sh during the weekly linting, just under info instead of warning.

The motivation here (discussed in #general > automatically apply code actions) is that following #36712 we should be able to partially automate the weekly linting PRs using Skimmer. As an example, the changes in #37018 were prepared in part in this way.

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[github-actions]

PR summary c551257516

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/pr_summary/declarations_diff.sh <optional_commit>

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

The doc-module for scripts/pr_summary/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/reporting/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).

[joneugster]

Did you verify none of the tooling relies on the linter warnings to be logWarnings instead of logInfos?

[chenson2018]

Yes, this is what I was trying to describe in the PR description, apologies if that was unclear. To my knowledge the only workflow that uses this option is weekly-lints.yml, which in using zulip_build_report.sh should report either.