`fatxpool`: do not use individual transaction listeners #2421

Job	Run time
preflight / preflight	48s
preflight / ci-versions	1m 7s
build (polkadot-availability-recovery, availability-recovery-regression-bench)	29s
build (polkadot-availability-distribution, availability-distribution-regression-bench)	37s
build (polkadot-node-core-approval-voting, approval-voting-regression-bench)	35s
build (polkadot-statement-distribution, statement-distribution-regression-bench)	26s
publish-benchmarks	0s
	4m 2s

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