feat: add tmp mimic pallet for bitacross #5598

Job	Run time
fmt	1m 32s
sequentialise	2s
set-condition	8s
parachain-clippy	15m 28s
parachain-build-dev	52m 22s
tee-clippy	0s
parachain-runtime-test	37m 6s
bitacross-clippy	0s
parachain-unit-test	9m 37s
tee-build	1m 9s
parachain-ts-test (litmus)	9m 25s
parachain-ts-test (litentry)	9m 23s
tee-multi-worker-test (lit-di-evm-identity-multiworker-test)	12m 26s
tee-single-worker-test (lit-di-substrate-identity-test)	9m 49s
parachain-ts-test (rococo)	28m 44s
tee-multi-worker-test (lit-di-substrate-identity-multiworker-test)	14m 59s
tee-single-worker-test (lit-di-evm-identity-test)	7m 42s
tee-multi-worker-test (lit-di-vc-multiworker-test)	12m 22s
tee-single-worker-test (lit-di-bitcoin-identity-test)	7m 5s
tee-single-worker-test (lit-di-vc-test)	12m 55s
tee-multi-worker-test (lit-dr-vc-multiworker-test)	11m 40s
tee-multi-worker-test (lit-resume-worker)	11m 12s
tee-single-worker-test (lit-dr-vc-test)	6m 11s
tee-single-worker-test (lit-parentchain-nonce)	5m 48s
tee-single-worker-test (lit-test-failed-parentchain-extrinsic)	6m 35s
push-docker	0s
	4h 43m 40s

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