[CI] set longer timeouts for the post-merge continuous job

Since my fix to have a well defined timeout for the build jobs, the build stage of all post-merge continuous pipelines was failing due to timed out tests.

Looking at the successful ones before the change it seems it typically needs around 60-62 minutes (+8-10 relative to pre-merge builds) with around 1650 s for the tests themselves (+400s / 5-6 minutes compared to pre-merge)

Here I try to make use of the new possibility to define the TO per job type

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requested review from @f.uhlig

assigned to @f.uhlig

Dear @f.uhlig, @v.friese, @p.-a.loizeau,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

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Why does code change say 1.5 hrs

  timeout: 1h 30m # Continuous tests after merge need more time than the pre-merge CI

    CI_TEST_STAGE_TOTAL_TIME_LIMIT: 1800 # in seconds = 30 m, Continuous tests after merge need longer than pre-merge CI

but below say 0.5 hours?

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approved this merge request

merged