pw/rebase-reflog-fixes (was Re: What's cooking in git.git (Oct 2022, #06; Wed, 19))

> * pw/rebase-reflog-fixes (2022-10-17) 9 commits
>   - rebase: cleanup action handling
>   - rebase --abort: improve reflog message
>   - rebase --apply: make reflog messages match rebase --merge
>   - rebase --apply: respect GIT_REFLOG_ACTION
>   - rebase --merge: fix reflog message after skipping
>   - rebase --merge: fix reflog when continuing
>   - t3406: rework rebase reflog tests
>   - rebase --apply: remove duplicated code
>   - Merge branch 'pw/rebase-keep-base-fixes' into pw/rebase-reflog-fixes
>   (this branch uses pw/rebase-keep-base-fixes.)
> 
>   Fix some bugs in the reflog messages when rebasing and changes the
>   reflog messages of "rebase --apply" to match "rebase --merge" with
>   the aim of making the reflog easier to parse.
> 
>   Will merge to 'next'??
>   source: <pull.1150.v3.git.1665567312.gitgitgadget@gmail.com>