Use rpc_port in bridge tests #12303

Job	Run time
preflight / preflight	46s
preflight / ci-versions	1m 1s
test-frame-ui	25m 59s
cargo-check-benches (master)	19m 56s
cargo-check-benches (current)	20m 20s
test-full-crypto-feature	3m 10s
cargo-check-all-crate-macos	10m 56s
cargo-check-each-crate (1)	15m 10s
test-node-metrics	7m 48s
cargo-check-each-crate (2)	16m 32s
cargo-check-each-crate (3)	6m 42s
cargo-check-each-crate (4)	14m 22s
cargo-check-each-crate (5)	20m 32s
cargo-check-each-crate (6)	12m 27s
cargo-check-each-crate (7)	24m 20s
test-frame-examples-compile-to-wasm	2m 50s
test-deterministic-wasm	5m 54s
check-tracing	2m 9s
check-metadata-hash	5m 49s
node-bench-regression-guard	13s
All test misc tests passed	1s
	3h 36m 57s

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