Notify telemetry only every second about the tx pool status #6641

Job	Run time
preflight / preflight	43s
preflight / ci-versions	56s
test-frame-ui	47m 22s
test-full-crypto-feature	2m 37s
cargo-check-benches (master)	20m 46s
cargo-check-each-crate (1)	18m 41s
cargo-check-benches (current)	23m 41s
cargo-check-each-crate (2)	20m 0s
cargo-check-each-crate (3)	8m 33s
cargo-check-each-crate (4)	17m 23s
test-node-metrics	10m 24s
cargo-check-each-crate (5)	25m 5s
cargo-check-each-crate (6)	15m 1s
cargo-check-all-crate-macos	12m 48s
cargo-check-each-crate (7)	30m 25s
test-frame-examples-compile-to-wasm	2m 56s
test-deterministic-wasm	6m 19s
check-tracing	2m 38s
check-metadata-hash	6m 13s
node-bench-regression-guard	12s
All test misc tests passed	1s
	4h 32m 44s

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