This is a clone of issue OCPBUGS-74165. The following is the description of the original issue:
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OKD builds for ose-aws-pod-identity-webhook fail during the Go build step with:

go: invalid GOTOOLCHAIN "gov1.24.11" 

The golang builder base image sets GO_VERSION=v1.24.11 (with "v" prefix). The hack/setup-go.sh script creates GOTOOLCHAIN=go${GO_VERSION} without stripping the  prefix, resulting in invalid value "gov1.24.11". This bug was masked in OpenShift builds  because the Go compliance shim forces GOTOOLCHAIN=local. OKD builds are exempt from compliance enforcement, exposing the issue.
 
Fix: Strip "v" prefix from GO_VERSION before constructing GOTOOLCHAIN.