[build_ts_refs] improve caches, allow building a subset of projects#107981

Merged

spalger merged 9 commits intoelastic:masterfrom

spalger:implement/intentionally-expire-extracted-caches

Aug 11, 2021

Commits on Aug 10, 2021

set declaration: true to avoid weird debug error
spalger
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fix jest tests
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Merge branch 'master' of github.com:elastic/kibana into implement/intentionally-expire-extracted-caches
spalger
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