inspector: support inspecting HTTP/2 request and response bodies #477

Job	Run time
Build slim tarball	1m 35s
aarch64-linux: with shared libraries	23m 59s
x86_64-linux: with shared libraries	28m 0s
x86_64-darwin: with shared libraries	33m 32s
aarch64-darwin: with shared libraries	27m 20s
	1h 54m 26s

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