inspector,http: support builtin http request bodies #6320

Job	Run time
Build slim tarball	48s
aarch64-linux: Cache V8 build	21s
aarch64-darwin: with shared libraries	28m 58s
x86_64-darwin: with shared libraries	36m 37s
x86_64-linux: with shared libraries	30m 30s
aarch64-linux: with shared openssl-1.1.1w	25m 51s
aarch64-linux: with shared openssl-3.0.19	25m 17s
aarch64-linux: with shared openssl-3.5.5	25m 57s
aarch64-linux: with shared openssl-4.0.0	25m 49s
aarch64-linux: with shared openssl-3.6.1	24m 36s
	3h 44m 44s

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