devel/py-buildbot*: Update to 3.4.1

• This also should fix the regression caused after the switch from py-sqlalchemy12 to py-sqlalchemy14 in e3f7785e1794.

Changelog since 2.10.5:

https://github.com/buildbot/buildbot/blob/v3.4.1/master/docs/relnotes/index.rst

PR: 259599
Reviewed by: koobs (maintainer)
Approved by: koobs (maintainer, implicit: MAINTAINER_POLICY)
MFH: 2022Q1 (fix regression with py-sqlalchemy14)