fix: Force disable "warnings as errors" flag for CL preprocessing #3938

Job	Run time
clippy ubuntu-latest	1m 9s
clippy macOS-latest	1m 2s
coverage ubuntu-20.04 rust nightly	4m 27s
clippy windows-latest	2m 17s
check_features (azure)	45s
coverage macos-13 rust nightly	9m 48s
rustfmt ubuntu-latest	12s
build sccache x86_64-unknown-linux-musl	5m 58s
check_features (gcs)	47s
build sccache-dist x86_64-unknown-linux-musl	4m 23s
check_features (gha)	35s
build sccache aarch64-unknown-linux-musl	6m 7s
check_features (memcached)	37s
test ubuntu-20.04 rust 1.75.0	2m 45s
build sccache armv7-unknown-linux-musleabi	6m 0s
test freebsd-13.2 rust stable (ubuntu-22.04)	9m 10s
test ubuntu-22.04 rust 1.75.0 dist-server	3m 8s
check_features (redis)	39s
build sccache i686-unknown-linux-musl	6m 10s
test ubuntu-20.04 rust stable	2m 33s
check_features (s3)	45s
build sccache x86_64-apple-darwin	8m 18s
test ubuntu-20.04 rust beta	2m 32s
toml_format	8s
check_features (webdav)	33s
build sccache aarch64-apple-darwin	4m 41s
test ubuntu-20.04 rust nightly	2m 23s
build sccache x86_64-pc-windows-msvc	15m 11s
test ubuntu-20.04 rust stable no-default-features	1m 47s
build sccache aarch64-pc-windows-msvc	16m 30s
test ubuntu-22.04 rust stable	2m 28s
test macos-13 rust stable	3m 25s
test macos-14 rust stable	2m 20s
test windows-2019 rust 1.75.0	5m 2s
test windows-2019 rust nightly	5m 8s
test windows-2019 rust beta	4m 56s
release	0s
	2h 24m 39s

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