Use fake_runtime_api to simplify code (#3215) #9057

Job	Run time
sequentialise	1h 40m 6s
fmt	1m 27s
set-condition	6s
tee-check	22m 21s
parachain-build-dev	51m 52s
identity-build	2m 4s
omni-executor-build	57s
parachain-runtime-test	22m 44s
omni-executor-check	0s
parachain-unit-test	8m 3s
parachain-clippy	16m 25s
omni-test	1m 55s
litentry	25m 55s
lit-di-identity-test	19m 55s
paseo	26m 15s
lit-dr-vc-test	14m 30s
lit-parentchain-nonce	7m 46s
${{ matrix.test_name }}	0s
lit-test-failed-parentchain-extrinsic	9m 50s
lit-omni-account-test	10m 42s
lit-native-request-vc-test	44m 18s
push-docker	0s
	6h 27m 11s

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