Raise and reraise exceptions with Stdlib rather than Lwt (#1079) #1659

Job	Run time
build-test-cohttp-bench (ubuntu-latest, 5.x, *.opam )	6m 14s
build-test-cohttp-eio (ubuntu-latest, 5.x, http.opam cohttp.opam cohttp-eio.opam )	4m 12s
build-test-default (ubuntu-latest, 4.14, *.opam !cohttp-eio.opam !cohttp-curl-async.opam !cohttp-...	2m 49s
build-test-cohttp-eio (macos-latest, 5.x, http.opam cohttp.opam cohttp-eio.opam )	4m 42s
build-test-cohttp-async (ubuntu-latest, 4.14, *.opam !cohttp-mirage.opam !cohttp-curl-lwt.opam !c...	2m 48s
build-test-default (ubuntu-latest, 5.x, *.opam !cohttp-eio.opam !cohttp-curl-async.opam !cohttp-a...	8m 35s
build-test-cohttp-async (ubuntu-latest, 5.x, *.opam !cohttp-mirage.opam !cohttp-curl-lwt.opam !co...	7m 44s
build-test-default (macos-latest, 4.14, *.opam !cohttp-eio.opam !cohttp-curl-async.opam !cohttp-a...	2m 1s
build-test-default (macos-latest, 5.x, *.opam !cohttp-eio.opam !cohttp-curl-async.opam !cohttp-as...	7m 1s
build-test-cohttp-async (macos-latest, 4.14, *.opam !cohttp-mirage.opam !cohttp-curl-lwt.opam !co...	2m 51s
build-test-cohttp-async (macos-latest, 5.x, *.opam !cohttp-mirage.opam !cohttp-curl-lwt.opam !coh...	7m 30s
	56m 27s

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