Migrate `pallet-tx-pause` to umbrella crate #17170

Job	Run time
check-dependency-rules	11s
check-fail-ci	12s
check-readme	3m 12s
check-workspace	20s
check-markdown	15s
preflight / preflight	1m 23s
preflight / ci-versions	54s
check-rust-feature-propagation	1m 58s
fmt	1m 9s
check-toml-format	58s
check-umbrella	2m 12s
test-rust-features	1m 58s
All quick checks passed	1s
	14m 43s

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