opt-in rustls-ffi FIPS support, Linux CI coverage #1706

Job	Run time
Valgrind	2m 58s
Certificate Compression	1m 39s
Check for documentation errors	49s
Build+test (clang, aws-lc-rs, stable, ubuntu-latest)	3m 50s
Build+test (clang, aws-lc-rs, beta, ubuntu-latest)	3m 41s
ensure-header-updated	1m 41s
FIPS	2m 38s
Build+test (clang, aws-lc-rs, nightly, ubuntu-latest)	3m 28s
Build+test (clang, aws-lc-rs, 1.71.0, ubuntu-latest)	3m 45s
Check minimum versions	1m 21s
Build+test (clang, ring, stable, ubuntu-latest)	1m 58s
Windows CMake, Cert. Compression	4m 4s
Build+test (clang, ring, beta, ubuntu-latest)	2m 13s
Build+test (clang, ring, nightly, ubuntu-latest)	2m 3s
Windows CMake, Debug configuration (aws-lc-rs)	2m 37s
Build+test (clang, ring, 1.71.0, ubuntu-latest)	2m 30s
Windows CMake, Release configuration (aws-lc-rs)	3m 48s
Build+test (gcc, aws-lc-rs, stable, ubuntu-latest)	2m 53s
Windows CMake, Debug configuration (ring)	2m 24s
Windows CMake, Release configuration (ring)	2m 37s
Build+test (gcc, aws-lc-rs, beta, ubuntu-latest)	3m 10s
Build+test (gcc, aws-lc-rs, nightly, ubuntu-latest)	2m 59s
Clang Tidy	6s
Build+test (gcc, aws-lc-rs, 1.71.0, ubuntu-latest)	3m 20s
Build+test (gcc, ring, stable, ubuntu-latest)	1m 53s
Build+test (gcc, ring, beta, ubuntu-latest)	1m 54s
Build+test (gcc, ring, nightly, ubuntu-latest)	2m 2s
Clippy	32s
Build+test (gcc, ring, 1.71.0, ubuntu-latest)	2m 20s
Build+test (macos-latest, clang, aws-lc-rs, stable)	4m 34s
Clippy nightly (optional)	1m 7s
Format	23s
Miri	1m 11s
	1h 18m 28s

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