Added live network test support for Westend bulletin chain (#216) #18

Job	Run time
build-runtimes (bulletin-westend, bulletin-westend-runtime, runtimes/bulletin-westend)	11m 15s
build-runtimes (bulletin-polkadot, bulletin-polkadot-runtime, runtimes/bulletin-polkadot)	11m 15s
build-node (macos-14, aarch64-apple-darwin, polkadot-bulletin-chain-macos-aarch64)	15s
build-runtimes (bulletin-paseo, bulletin-westend-runtime, runtimes/bulletin-westend)	11m 16s
build-node (ubuntu-latest, x86_64-unknown-linux-gnu, polkadot-bulletin-chain-linux)	11m 16s
publish-release	1s
	45m 18s

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