Adding support for email identity #8072

Job	Run time
fmt	1m 9s
sequentialise	1s
set-condition	8s
parachain-dynamic-contract-test	19s
identity-build	7m 59s
tee	8m 2s
parachain-build-dev	4m 42s
bitacross-build	3m 12s
bitacross	8m 1s
parachain-clippy	0s
parachain-runtime-test	0s
parachain-unit-test	0s
lit-sign-bitcoin	3m 22s
litentry	1m 12s
rococo	1m 0s
${{ matrix.test_name }}	1s
${{ matrix.test_name }}	1s
push-docker	1s
	39m 10s

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