ATX handler rejects invalid ATXs on pubsub lvl (#6142) #19717

Job	Run time
filter-changes	3s
lint	3m 29s
quicktests	1m 48s
build (ubuntu-22.04)	53s
build-tools (ubuntu-22.04)	54s
build (ubuntu-latest-arm-8-cores)	7m 21s
build-tools (ubuntu-latest-arm-8-cores)	4m 4s
build (macos-13)	2m 18s
build-tools (macos-13)	2m 5s
build (self-hosted, macOS, ARM64, go-spacemesh)	26s
build-tools (self-hosted, macOS, ARM64, go-spacemesh)	10m 35s
unittests (ubuntu-22.04)	23m 13s
build (windows-2022)	8m 50s
unittests (ubuntu-latest-arm-8-cores)	31m 36s
build-tools (windows-2022)	5m 44s
unittests (macos-13)	26m 41s
unittests (self-hosted, macOS, ARM64, go-spacemesh)	19m 47s
unittests (windows-2022)	32m 1s
ci-status	2s
	3h 1m 50s

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