Implement read-only local cache #3387

Job	Run time
clippy ubuntu-latest	1m 24s
clippy macOS-latest	3m 49s
clippy windows-latest	2m 41s
rustfmt ubuntu-latest	14s
build sccache x86_64-unknown-linux-musl	5m 49s
build sccache-dist x86_64-unknown-linux-musl	4m 16s
check_features (azure)	49s
build sccache aarch64-unknown-linux-musl	6m 45s
check_features (gcs)	57s
build sccache armv7-unknown-linux-musleabi	6m 6s
test ubuntu-20.04 rust 1.70.0	3m 21s
build sccache i686-unknown-linux-musl	6m 16s
test ubuntu-22.04 rust 1.70.0 dist-server	3m 25s
check_features (gha)	51s
test ubuntu-20.04 rust stable	2m 57s
build sccache x86_64-apple-darwin	13m 36s
test ubuntu-20.04 rust beta	2m 39s
build sccache aarch64-apple-darwin	15m 35s
test ubuntu-20.04 rust nightly	2m 39s
build sccache x86_64-pc-windows-msvc	14m 28s
test ubuntu-22.04 rust stable	2m 36s
check_features (memcached)	49s
test macOS-11 rust stable	5m 6s
check_features (redis)	1m 1s
test windows-2019 rust 1.70.0	4m 34s
toml_format	8s
coverage ubuntu-20.04 rust nightly	4m 58s
check_features (s3)	49s
test windows-2019 rust nightly	5m 4s
check_features (webdav)	52s
coverage macOS-11 rust nightly	10m 44s
test windows-2019 rust beta	4m 59s
test freebsd-13.2 rust stable (ubuntu-22.04)	9m 21s
release	0s
	2h 29m 38s

Provide feedback