Cleanup legacy code from thales era #8439

Job	Run time
build-test-wasm	2m 17s
build-docusaurus	1m 42s
build-open-api-ui	6s
build (macos-14)	1m 42s
build (windows-latest)	4m 24s
build-ubuntu-X64	4m 56s
cargo-doc	51s
check	1m 27s
test (ubuntu-24.04)	7m 10s
test (macos-14)	1m 48s
test (windows-latest)	4m 30s
publish-wasm-test (mithril-client-wasm)	1m 29s
build-test-explorer	1m 52s
publish-docs	0s
e2e (std, pythagoras, 10.1.3, 0, #1)	2m 3s
e2e (std, pythagoras, 10.1.3, 0, #2)	2m 8s
e2e (std, pythagoras, 10.1.4, 0, #1)	1m 41s
e2e (std, pythagoras, 10.1.4, 0, #2)	2m 36s
e2e (std, pythagoras, 10.2.1, 0, #1)	1m 45s
e2e (std, pythagoras, 10.2.1, 0, #2)	1m 54s
e2e (p2p, pythagoras, 10.1.4, 0, #1, --use-p2p-network)	1m 34s
e2e (std, pythagoras, 10.1.4, 0, #1, --mithril-era-regenesis-on-switch)	1m 39s
send-tests-results	18s
docker-mithril (mithril-aggregator)	24s
unstable-release	0s
docker-mithril (mithril-client-cli)	21s
docker-mithril (mithril-signer)	32s
publish-crate-test (mithril-stm)	18s
docker-mithril (mithril-relay)	23s
publish-crate-test (mithril-build-script)	9s
publish-crate-test (mithril-common)	9s
publish-crate-test (mithril-client)	16s
deploy-testing (testing-preview)	25s
	52m 49s

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