NIFI-6169 Signed release tag for NiFi 1.9.2 release

NIFI-6169-RC2 copy for tag nifi-1.9.2-RC2

NIFI-6169-RC1 copy for tag nifi-1.9.2-RC1

NIFI-6116 Signed release tag for approved release of NiFi 1.9.1

NIFI-6116-RC1 copy for tag nifi-1.9.1-RC1

NIFI-6029 Signed release tag for approved release of NiFi 1.9.0

NIFI-6029-RC2 copy for tag nifi-1.9.0-RC2

NIFI-6029-RC1 copy for tag nifi-1.9.0-RC1

NIFI-5720 Signed release tag for approved release of NiFi 1.8.0

NIFI-5720-RC3 copy for tag nifi-1.8.0-RC3