CI: caching: add early termination & run check on schedule#2506

mergify[bot] merged 4 commits intohaskell:masterhaskell/haskell-language-server:masterfrom

Anton-Latukha:2021-12-18-keep-main-cache-by-scheduleAnton-Latukha/haskell-language-server:2021-12-18-keep-main-cache-by-scheduleCopy head branch name to clipboard