Add a single CometBFT dummy validator #1523

Job	Run time
build-binaries	11m 31s
check-packages	5m 23s
changelog	17s
build-wasm (wasm, build-wasm-scripts, wasm/tx_.wasm wasm/vp_.wasm wasm/checksums.json )	4m 13s
lints	5m 30s
rust-docs	6m 30s
build-wasm (wasm-for-tests, build-wasm-tests-scripts, wasm_for_tests/*.wasm)	3m 32s
check-benchmarks	10m 58s
test-integration	21m 59s
test-unit	12m 0s
test-wasm	7m 25s
test-e2e-with-device-automation	9m 35s
test-e2e (0)	22m 25s
test-e2e (1)	19m 23s
test-e2e (2)	21m 43s
test-e2e (3)	22m 37s
test-e2e (4)	24m 15s
upload-coverage	14s
	3h 29m 30s

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