phases: move RemotePhasesSummary to revision number
This continue our quest to align more logic on revision number instead of
node-ids. The motivation is similar to the change to `new_heads` and
`analyze_remote_phases` a few changeset earlier.
Again, we take this as an opportunity to rename the class, and the attribute to
the new naming scheme. This will highlight the need for code update for any
code using it an expecting node-ids.
Many of the rev-num → node-id conversion we had to introduce in the previous
changesets can now be removed. More will be removed in the future as we continue
to align code toward rev-num usage.
time saved in the 100 milliseconds order of magnitude for the mozilla-try
benchmark I have been using.
/assign_reviewer @mercurial.review
<!--
Welcome to the Mercurial Merge Request creation process:
* Set a simple title for your MR,
* All important information should be contained in your changesets' content or description,
* You can add some workflow-relevant information here (eg: when this depends on another MR),
* If your changes are not ready for review yet, click `Start the title with Draft:` under the title.
More details here:
* https://www.mercurial-scm.org/wiki/ContributingChanges
* https://www.mercurial-scm.org/wiki/Heptapod
-->