Add prometheus-operator/pkg/client dependency

Package `github.com/prometheus-operator/prometheus-operator/pkg/client`
can be used for testing purpose.

Signed-off-by: Andrea Panattoni <apanatto@redhat.com>

go.mod

@@ -22,6 +22,7 @@ require (
 	github.com/openshift/client-go v0.0.0-20220831193253-4950ae70c8ea
 	github.com/openshift/machine-config-operator v0.0.1-0.20230118083703-fc27a2bdaa85
 	github.com/pkg/errors v0.9.1
+	github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring v0.68.0
 	github.com/safchain/ethtool v0.3.0
 	github.com/spf13/cobra v1.7.0
 	github.com/stretchr/testify v1.8.4

go.sum

@@ -375,6 +375,8 @@ github.com/pkg/sftp v1.10.1/go.mod h1:lYOWFsE0bwd1+KfKJaKeuokY15vzFx25BLbzYYoAxZ
 github.com/pkg/sftp v1.13.1/go.mod h1:3HaPG6Dq1ILlpPZRO0HVMrsydcdLt6HRDccSgb87qRg=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring v0.68.0 h1:yl9ceUSUBo9woQIO+8eoWpcxZkdZgm89g+rVvu37TUw=
+github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring v0.68.0/go.mod h1:9Uuu3pEU2jB8PwuqkHvegQ0HV/BlZRJUyfTYAqfdVF8=
 github.com/prometheus/client_golang v1.17.0 h1:rl2sfwZMtSthVU752MqfjQozy7blglC+1SOtjMAMh+Q=
 github.com/prometheus/client_golang v1.17.0/go.mod h1:VeL+gMmOAxkS2IqfCq0ZmHSL+LjWfWDUmp1mBz9JgUY=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=