Migrate `pallet-tx-pause` to umbrella crate #9140

Job	Run time
preflight / preflight	1m 22s
preflight / ci-versions	58s
cargo-check-benches (master)	20m 48s
cargo-check-benches (current)	23m 54s
cargo-check-each-crate (1)	20m 55s
cargo-check-each-crate (2)	18m 14s
cargo-check-each-crate (3)	6m 48s
test-frame-ui	26m 36s
cargo-check-each-crate (4)	18m 35s
cargo-check-each-crate (5)	26m 38s
cargo-check-each-crate (6)	13m 7s
test-full-crypto-feature	2m 29s
cargo-check-each-crate (7)	27m 48s
test-node-metrics	10m 30s
cargo-check-all-crate-macos	11m 23s
test-frame-examples-compile-to-wasm	2m 59s
check-tracing	2m 14s
test-deterministic-wasm	7m 32s
check-metadata-hash	6m 40s
node-bench-regression-guard	12s
All test misc tests passed	1s
	4h 9m 43s

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