Upgrade to go 1.20 (#459)

This upgrades go to version 1.20. This is needed to be compatible with a
future change to the vclusterOps library.

.github/actions/setup-go/action.yaml

@@ -6,4 +6,4 @@ runs:
     - name: Set up Go
       uses: actions/setup-go@v3
       with:
-        go-version: 1.19.6
+        go-version-file: go.mod

DEVELOPER.md

@@ -22,7 +22,7 @@ This guide explains how to set up an environment to develop and test the Vertica
 Prior to developing, the following software needs to be installed manually.  There is other software that needed, but it is downloaded through make targets in the repo's bin directory.
 
 - [docker](https://docs.docker.com/get-docker/) (version 23.0)
-- [go](https://golang.org/doc/install) (version 1.19.6)
+- [go](https://golang.org/doc/install) (version 1.20)
 - [kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/) (version 1.20.1)
 - [helm](https://helm.sh/docs/intro/install/) (version 3.5.0)
 - [kubectx](https://github.com/ahmetb/kubectx/releases/download/v0.9.1/kubectx) (version 0.9.1)

docker-operator/Dockerfile

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.19 as builder
+FROM golang:1.20 as builder
 ARG TARGETOS
 ARG TARGETARCH
 

go.mod

@@ -1,6 +1,6 @@
 module github.com/vertica/vertica-kubernetes
 
-go 1.19
+go 1.20
 
 require (
 	github.com/DATA-DOG/go-sqlmock v1.5.0

scripts/setup-olm.sh

@@ -82,7 +82,6 @@ if ! $SCRIPT_DIR/is-openshift.sh
 then
     if ! kubectl get -n $OLM_NS deployment olm-operator
     then
-        # When changing the olm version, update the image in tests/external-images-build.txt
         $OPERATOR_SDK olm install --version 0.19.1
 
         # Delete the default catalog that OLM ships with to avoid a lot of duplicates entries.