Make `TransactionExtension` tuple of tuple transparent for implicatio… #29

Job	Run time
preflight / preflight	10s
preflight / ci-versions	59s
build (polkadot-availability-recovery, availability-recovery-regression-bench)	7m 8s
build (polkadot-availability-distribution, availability-distribution-regression-bench)	4m 56s
build (polkadot-node-core-approval-voting, approval-voting-regression-bench)	22m 22s
build (polkadot-statement-distribution, statement-distribution-regression-bench)	3m 54s
publish-benchmarks	3m 10s
	42m 39s

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