diagnostics_channel: add diagnostics channels for web locks #3964

Job	Run time
Build slim tarball	2m 50s
aarch64-linux: with shared libraries	20m 10s
aarch64-darwin: with shared libraries	21m 40s
x86_64-darwin: with shared libraries	39m 32s
x86_64-linux: with shared libraries	21m 32s
	1h 45m 44s

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