Don't delete a branch involved in an open merge request in "Delete all merged branches" service

Customers were surprised by the previous behavior, which destroyed branches even though an open merge request existed for it.

Closes #29427 (closed)

changed milestone to %9.1

changed milestone to %9.2

added 1 commit

• 8a103f9e - Don't delete a branch involved in an open merge request in "Delete all merged branches" service

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changed milestone to %9.1

mentioned in issue #29427 (closed)

assigned to @DouweM

assigned to @stanhu

added 58 commits

• 8a103f9e...ec9f6180 - 56 commits from branch master
• c01466e7 - Don't delete a branch involved in an open merge request in "Delete all merged branches" service
• 09dc2ea8 - Optimize queries using SELECT DISTINCT

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resolved all discussions

assigned to @DouweM

Thanks for picking this up @stanhu!

added 1 commit

• 8db2b2f2 - Optimize queries using SELECT DISTINCT

Compare with previous version

resolved all discussions

assigned to @stanhu

resolved all discussions

added 80 commits

• 8db2b2f2...a9da3743 - 79 commits from branch master
• 11fd2f80 - Don't delete a branch involved in an open merge request in "Delete all merged branches" service

Compare with previous version

assigned to @DouweM

approved this merge request

enabled an automatic merge when the pipeline for 11fd2f80 succeeds

merged

mentioned in commit 3fecb4be

Picked into 9-1-stable, will go into 9.1.0-rc6

mentioned in commit 1845f9e5