Disable preprocessor cache when doing distributed compilation #3734

Job	Run time
coverage ubuntu-20.04 rust nightly	4m 48s
build sccache x86_64-unknown-linux-musl	6m 2s
coverage macOS-11 rust nightly	16m 41s
check_features (azure)	46s
build sccache-dist x86_64-unknown-linux-musl	4m 31s
clippy ubuntu-latest	1m 21s
check_features (gcs)	1m 3s
build sccache aarch64-unknown-linux-musl	6m 34s
clippy macOS-latest	1m 19s
check_features (gha)	36s
build sccache armv7-unknown-linux-musleabi	5m 43s
clippy windows-latest	2m 33s
test ubuntu-20.04 rust 1.70.0	2m 54s
check_features (memcached)	55s
build sccache i686-unknown-linux-musl	5m 46s
rustfmt ubuntu-latest	10s
check_features (redis)	51s
test ubuntu-22.04 rust 1.70.0 dist-server	3m 25s
build sccache x86_64-apple-darwin	18m 34s
check_features (s3)	58s
test ubuntu-20.04 rust stable	2m 31s
build sccache aarch64-apple-darwin	5m 10s
check_features (webdav)	37s
test freebsd-13.2 rust stable (ubuntu-22.04)	8m 38s
build sccache x86_64-pc-windows-msvc	14m 18s
test ubuntu-20.04 rust beta	2m 28s
test ubuntu-20.04 rust nightly	2m 33s
toml_format	13s
test ubuntu-20.04 rust stable no-default-features	1m 34s
test ubuntu-22.04 rust stable	2m 30s
test macOS-11 rust stable	4m 55s
test macos-14 rust stable	2m 24s
test windows-2019 rust 1.70.0	4m 39s
test windows-2019 rust nightly	4m 53s
test windows-2019 rust beta	4m 17s
release	0s
	2h 27m 10s

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