setup: configure release-4.13 for Go 1.19 patch testing

Author: rissh

.ci-operator.yaml

@@ -1,3 +1,3 @@
 build_root:
   image_stream_tag:
-    tag: golang-1.21
+    tag: golang-1.19

README.md

@@ -1 +1,14 @@
 # arc-test-component-b
+
+## Known Vulnerabilities
+
+- CVE-2026-33186 In Modules: `.`
+
+## Branch Info
+
+| Property | Value |
+|---|---|
+| Go Version | 1.19 |
+| grpc | v1.64.0 (vulnerable) |
+| Module Structure | Single module |
+| Expected ARC Behavior | Fork/patch (`v1.64.x-sec.1` for Go 1.19) |

go.mod

@@ -1,16 +1,8 @@
 module github.com/openshift-sustaining/arc-test-component-b
 
-go 1.21
+go 1.19
 
 require (
-	github.com/golang/glog v1.2.1
-	google.golang.org/grpc v1.65.0
-)
-
-require (
-	golang.org/x/net v0.25.0 // indirect
-	golang.org/x/sys v0.20.0 // indirect
-	golang.org/x/text v0.15.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240528184218-531527333157 // indirect
-	google.golang.org/protobuf v1.34.1 // indirect
+	github.com/golang/glog v1.2.0
+	google.golang.org/grpc v1.64.0
 )