Revert "Remove reqwest dependency" #814

Job	Run time
assert_full_test_suite	8s
Build aarch64-apple-darwin target	2m 8s
test (ubuntu-latest)	3m 2s
Build x86_64-apple-darwin target	8m 37s
test (macos-latest)	2m 48s
Build x86_64-pc-windows-msvc target	5m 12s
test (windows-latest)	5m 27s
Build x86_64-unknown-linux-gnu target	3m 34s
Build x86_64-unknown-linux-musl target	5m 30s
rust-test	1m 43s
lint	1m 20s
rust-test-vectors	3m 13s
kotlin-build-test-deploy-snapshot	1m 41s
kotlin-acceptance-test (ubuntu-latest)	12s
kotlin-acceptance-test (macos-latest)	21s
kotlin-acceptance-test (macos-12)	31s
kotlin-acceptance-test (windows-latest)	26s
	45m 53s

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