[9.20] chg: ci: Increase shotgun pipeline timeout
When running shotgun tests on tagged releases, the increased number of jobs may cause the shotgun pipeline to take longer than 50 minutes to finish.
Backport of MR !9599 (merged)
When running shotgun tests on tagged releases, the increased number of jobs may cause the shotgun pipeline to take longer than 50 minutes to finish.
Backport of MR !9599 (merged)