dns parser: set RCODE only in DNS responses #1943

Job	Run time
build_bin	13s
count	4m 23s
testunit (ubuntu-24.04, 1.21, .)	1m 8s
testunit (ubuntu-24.04, 1.21, pkgconfig)	11s
testunit (ubuntu-24.04, 1.21, pkginit)	1m 8s
testunit (ubuntu-24.04, 1.21, dnsutils)	25s
testunit (ubuntu-24.04, 1.21, workers)	4m 24s
testunit (ubuntu-24.04, 1.21, transformers)	40s
testunit (ubuntu-24.04, 1.21, telemetry)	20s
testunit (ubuntu-24.04, 1.22, .)	1m 6s
testunit (ubuntu-24.04, 1.22, pkgconfig)	10s
testunit (ubuntu-24.04, 1.22, pkginit)	1m 10s
testunit (ubuntu-24.04, 1.22, dnsutils)	22s
testunit (ubuntu-24.04, 1.22, workers)	4m 23s
testunit (ubuntu-24.04, 1.22, transformers)	38s
testunit (ubuntu-24.04, 1.22, telemetry)	22s
testunit (ubuntu-24.04, 1.23, .)	1m 1s
testunit (ubuntu-24.04, 1.23, pkgconfig)	11s
testunit (ubuntu-24.04, 1.23, pkginit)	1m 16s
testunit (ubuntu-24.04, 1.23, dnsutils)	18s
testunit (ubuntu-24.04, 1.23, workers)	4m 20s
testunit (ubuntu-24.04, 1.23, transformers)	35s
testunit (ubuntu-24.04, 1.23, telemetry)	23s
metrics	12s
config	15s
	29m 34s

Provide feedback