quic: apply multiple security posture improvements #7135

Job	Run time
Build slim tarball	1m 7s
aarch64-linux: Cache V8 build	3m 19s
aarch64-darwin: with shared libraries	3m 22s
x86_64-linux: with shared libraries	3m 20s
x86_64-darwin: with shared libraries	3m 28s
aarch64-linux: with shared ${{ matrix.openssl.name }}	1s
	14m 37s

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