Merge pull request #2199 from jan--f/go.mod-1.20

OCPBUGS-24977: use 1.20 in go.mod

.ci-operator.yaml

@@ -1,4 +1,4 @@
 build_root_image:
   name: release
   namespace: openshift
-  tag: rhel-9-release-golang-1.21-openshift-4.16
+  tag: rhel-9-release-golang-1.20-openshift-4.16

Makefile

@@ -25,7 +25,7 @@ BIN_DIR ?= $(shell pwd)/tmp/bin
 # Docgen related variables
 TYPES_TARGET=pkg/manifests/types.go
 K8S_VERSION=$(shell echo -n v1. &&  cat go.mod | grep -w "k8s.io/api" | awk '{ print $$2 }' | cut -d "." -f 2)
-PO_VERSION=$(shell cat go.mod | grep -w "github.com/prometheus-operator/prometheus-operator" | awk '{ print $$2 }' | sort -u)
+PO_VERSION=$(shell cat go.mod | grep "github.com/prometheus-operator/prometheus-operator[^=>]\+$$" | awk '{ print $$2 }' | sort -u)
 
 EMBEDMD_BIN=$(BIN_DIR)/embedmd
 JB_BIN=$(BIN_DIR)/jb

go.mod

@@ -1,6 +1,6 @@
 module github.com/openshift/cluster-monitoring-operator
 
-go 1.21
+go 1.20
 
 require (
 	github.com/Jeffail/gabs v1.4.0
@@ -158,3 +158,5 @@ require (
 )
 
 replace k8s.io/kube-openapi => k8s.io/kube-openapi v0.0.0-20230928195430-ce36a0c3bb67
+
+replace github.com/prometheus-operator/prometheus-operator v0.70.0 => github.com/openshift/prometheus-operator v0.20.1-0.20231211152750-5bf04f3ca997