Replacing references to comm-esr91 with comm-esr102. As this patch is not
intended for uplift to comm-esr91, that's not a problem.

Opting to remove the "comm-bump-esr" block from config.yml. That is intended to
run with the c-central to c-beta merges. It's never been used and it's unlikely
that it will be since patch-level releases from Thunderbird's comm-esrXX occur
regularly. This would bump the version too early and force patch releases to
use a release branch unnecessarily.

update_verify_config.py is mostly copied verbatim from gecko_taskgraph. The
changes are in INCLUDE_VERSION_REGEXES and MAR_CHANNEL_ID_OVERRIDE_REGEXES
which are modified to be more suitable for Thunderbird.

The "beta" INCLUDE regex will only match version numbers ending "bN". This
is to avoid trying to test updating a release version like 91.0 to a beta.
For Firefox, the "bN" is optional as they test updating release versions to
late betas.

Depends on D145385

Pushed by geoff@darktrojan.net:
https://hg.mozilla.org/comm-central/rev/7e5d7845e858
Taskgraph configuration updates for comm-esr102. r=#thunderbird-reviewers,lasana
https://hg.mozilla.org/comm-central/rev/6cd660e7772e
Make update-verify-config work better for Thunderbird releases. r=#thunderbird-reviewers,mkmelin