Use sccache for github CI builds #2126

Job	Run time
Build aarch64-apple-darwin	10m 30s
Build and test docker images	26m 2s
Build debian-x86_64	10m 1s
Build x86_64-apple-darwin	4m 8s
Lint and Unit test	10m 2s
Build x86_64-pc-windows-msvc	16m 3s
Build x86_64-unknown-linux-gnu	9m 37s
Test on macOS-latest	4m 58s
Test postgis:11-3.0-alpine sslmode=disable	2m 45s
Test on windows-latest	1m 48s
Test on ubuntu-latest	48s
Test postgis:14-3.3-alpine sslmode=disable	4m 2s
Test postgis:15-3.3 sslmode=require	5m 29s
Package	1m 27s
CI Finished	3s
	1h 47m 43s

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