[list_tezt_warnings]: make general with [job_filter], [log_pattern] and rename to [grep_pipeline_logs]

What

This adds a few options to scripts/ci/list_tezt_warnings to make it useful for other things than listing tezt warnings:

• The set of filtered jobs can be set through [--job-filter]
• The patterns to look can be set through [--log-pattern]
• If you only want the name and URL of set of jobs matching the given pattern, set [--jobs-with-matches].
• Logs can be fetched in parallel using [--parallel]

Why

I needed it to look for something else than tezt warnings.

How

By harnessing the immense power of (OCaml) clap.

Manually testing the MR

Try:

dune exec scripts/ci/grep_pipeline_logs/main.exe -- --job-filter '.*' --log-pattern '(Updating crates.io index)' --jobs-with-matches 1301833746

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR