net: support TCP_KEEPINTVL and TCP_KEEPCNT in setKeepAlive #7882

Job	Run time
Build slim tarball	1m 36s
aarch64-linux: Cache V8 build	24s
x86_64-linux: with shared libraries	28m 15s
x86_64-darwin: with shared libraries	44m 35s
aarch64-darwin: with shared libraries	27m 20s
aarch64-linux: with shared boringssl-0.20260526.0	25m 42s
aarch64-linux: with shared openssl-3.5.6	25m 55s
aarch64-linux: with shared openssl-3.0.20	24m 49s
aarch64-linux: with shared openssl-4.0.0	25m 26s
aarch64-linux: with shared openssl-3.6.2	27m 43s
aarch64-linux: with shared openssl-1.1.1w	25m 57s
	4h 17m 42s

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