feat: Add delete of release candidates

[thielpa]

This PR adds the possibility to delete release candidates.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for a7413b01	✅ 13.33%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (a7413b0)	Report Missing	Report Missing	Report Missing
Head commit (3b032e8)	5245	322	6.14%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#366)	15	2	13.33%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[egekocabas]

Only did the code review I will run and test it later but it looks pretty good and clean 👍🏻

[egekocabas]

Tested locally LGTM 🚀

(I have updated the PR with latest staging changes; while squash merging, do not forget to remove me from the commit as the co-author 👍🏻 )