ROX-32250: Enable MintMaker auto-merges on all branches

[tommartensen]

Description

Re-enables auto-merges for Renovate Bot on all branches.
They were disabled because

(a) email noise --> resolved by https://issues.redhat.com/browse/ROX-31146
(b) no ability to re-run tagged builds --> now possible
(c) commit noise --> we believe that it's not an issue

Checklist

• Investigated and inspected CI test results
• Updated documentation accordingly

Automated testing

• Added unit tests
• Added integration tests
• Added regression tests

If any of these don't apply, please comment below.

Testing Performed

Not required.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 27.38%. Comparing base (03593d5) to head (6e68e2a).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2771   +/-   ##
=======================================
  Coverage   27.38%   27.38%           
=======================================
  Files          95       95           
  Lines        5427     5427           
  Branches     2548     2548           
=======================================
  Hits         1486     1486           
  Misses       3214     3214           
  Partials      727      727           

Flag	Coverage Δ
collector-unit-tests	27.38% <ø> (ø)

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