aggregator: fix flakiness of tests that uses the snapshotter and simplify http server tests #8041

Job	Run time
build-open-api-ui	6s
build-docusaurus	1m 56s
build-test-wasm	2m 41s
build (macos-14)	1m 51s
build-ubuntu-X64	4m 49s
build (macos-14-large)	1m 48s
cargo-doc	51s
build (windows-latest)	4m 22s
check	1m 35s
test (ubuntu-22.04)	7m 56s
test (macos-14)	1m 31s
test (macos-14-large)	1m 37s
test (windows-latest)	2m 54s
build-test-explorer	2m 0s
publish-wasm-test (mithril-client-wasm)	1m 35s
publish-docs	0s
e2e (std, thales, 10.1.3, 0, #1)	1m 54s
e2e (std, thales, 10.1.3, 0, #2)	1m 27s
e2e (std, thales, 10.1.4, 0, #1)	1m 40s
e2e (std, thales, 10.1.4, 0, #2)	1m 41s
e2e (std, pythagoras, 10.1.3, 0, #1)	1m 37s
e2e (std, pythagoras, 10.1.3, 0, #2)	2m 42s
e2e (std, pythagoras, 10.1.4, 0, #1)	1m 29s
e2e (std, pythagoras, 10.1.4, 0, #2)	2m 49s
e2e (p2p, thales, 10.1.4, 0, #1, --use-p2p-network)	2m 24s
e2e (std, thales, pythagoras, 10.1.4, 0, #1)	1m 55s
e2e (std, thales, pythagoras, 10.1.4, 0, #1, --mithril-era-regenesis-on-switch)	1m 58s
send-tests-results	18s
publish-crate-test (mithril-stm)	16s
docker-mithril (mithril-aggregator)	24s
publish-crate-test (mithril-build-script)	16s
docker-mithril (mithril-client-cli)	32s
unstable-release	0s
publish-crate-test (mithril-common)	14s
docker-mithril (mithril-signer)	24s
publish-crate-test (mithril-client)	16s
docker-mithril (mithril-relay)	38s
deploy-testing (testing-preview)	19s
deploy-testing (testing-sanchonet)	22s
	1h 3m 7s

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