Pin ubi9/go-toolset container image

There is an issue with the latest image which can not be pulled in
CentOS10 systems [1]. Until it is fixed, let's pin to the previous
container image tag to unblock centos10 jobs [2]

[1] https://issues.redhat.com/browse/RHEL-128838
[2] https://softwarefactory-project.io/zuul/t/rdoproject.org/builds?job_name=openstack-meta-content-provider-master&project=openstack-k8s-operators/watcher-operator

Signed-off-by: Alfredo Moralejo <[email protected]>

Author: amoralej

Dockerfile

@@ -1,4 +1,6 @@
-ARG GOLANG_BUILDER=registry.access.redhat.com/ubi9/go-toolset:1.24
+# TODO(amoralej) go-toolset image pinned until a fix is provided for
+# https://issues.redhat.com/browse/RHEL-128838
+ARG GOLANG_BUILDER=registry.access.redhat.com/ubi9/go-toolset:1.24.6-1762230058
 ARG OPERATOR_BASE_IMAGE=registry.access.redhat.com/ubi9/ubi-minimal:9.6
 # Build the manager binary
 FROM $GOLANG_BUILDER AS builder