[FLINK-32392][ci] Invalidate Maven repo cache on Azure every year to reduce its disk usage #22858
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What is the purpose of the change
This pull request adds year number before the cache key of local Maven repo on Azure Pipeline, so that the cache will be invalidated per year, in order to reduce the disk usage of Maven repo.
Brief change log
Verifying this change
This change is already covered by existing tests.
Does this pull request potentially affect one of the following parts:
@Public(Evolving)
: (yes / no)Documentation