Fix[Referenda]: Use `BoundedVec<u8>` as field type for `TrackInfo::name` #13566

Job	Run time
isdraft / isdraft	1s
preflight / preflight	45s
preflight / ci-versions	1m 14s
cargo-check-benches (master)	2m 14s
cargo-check-benches (current)	2m 24s
test-frame-ui	32m 37s
test-full-crypto-feature	2m 19s
cargo-check-each-crate (1)	11m 25s
cargo-check-each-crate (2)	11m 19s
test-node-metrics	14m 29s
cargo-check-each-crate (3)	11m 12s
cargo-check-all-crate-macos	13m 21s
cargo-check-each-crate (4)	11m 12s
cargo-check-each-crate (5)	11m 17s
cargo-check-each-crate (6)	11m 14s
cargo-check-each-crate (7)	11m 5s
test-frame-examples-compile-to-wasm	2m 47s
node-bench-regression-guard	9s
test-deterministic-wasm	7m 27s
check-tracing	2m 11s
check-metadata-hash	7m 57s
All test misc tests passed	1s
	2h 48m 40s

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