feat: tracing for http transports #2172

Job	Run time
wasm-unknown	1m 5s
doctest	1m 24s
test ubuntu-latest stable --no-default-features	1m 39s
test ubuntu-latest stable	1m 25s
cfg-check	1m 19s
test ubuntu-latest nightly --no-default-features	2m 50s
clippy	46s
test ubuntu-latest nightly	2m 41s
test ubuntu-latest 1.76 --no-default-features	53s
docs	1m 52s
test ubuntu-latest 1.76	1m 11s
feature-checks	2m 52s
fmt	12s
test windows-latest stable --no-default-features	4m 39s
test windows-latest stable	4m 26s
no-std	31s
wasm-wasi	1m 28s
test windows-latest nightly --no-default-features	6m 19s
test windows-latest nightly	6m 18s
test windows-latest 1.76 --no-default-features	4m 6s
test windows-latest 1.76	2m 19s
test ubuntu-latest stable --all-features	2m 19s
test ubuntu-latest nightly --all-features	3m 5s
	55m 39s

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