Hello,

[GNU-796] Stabilize GDB testsuite results in the CI:

- Submitted and merged a couple of review requests removing obsolete CI jobs related to release automation and release regression detection

- Finished version of scripts that have most of the logic for rerunning testsuites in ABE. Submitted as a review request. Addressed review comments and submitted v2.

- Maxim found out a way to simplify the logic of determining whether a new testsuite run is warranted by using validate_failures.py, which I'm now implementing.