podvm-builder: use openshift/cloud-api-adaptor for CAA sources

Our builds from Konflux need to use our fork under the openshift org
when pulling the sources that are shipped in the podvm-builder image.

Doing that as environment variable during build, so that we don't
need to modify the Dockerfile.

Signed-off-by: Julien Ropé <[email protected]>

Author: littlejawa

.tekton/build-args.env

@@ -0,0 +1,3 @@
+CAA_SRC=https://github.com/openshift/cloud-api-adaptor
+CAA_REF=osc-release
+

.tekton/osc-podvm-builder-pull-request.yaml

@@ -31,6 +31,8 @@ spec:
     value: Dockerfile.podvm-builder
   - name: path-context
     value: config/peerpods/podvm
+  - name: build-args-file
+    value: '.tekton/build-args.env'
   pipelineSpec:
     description: |
       This pipeline is ideal for building container images from a Containerfile while reducing network traffic.

.tekton/osc-podvm-builder-push.yaml

@@ -27,6 +27,8 @@ spec:
     value: Dockerfile.podvm-builder
   - name: path-context
     value: config/peerpods/podvm
+  - name: build-args-file
+    value: '.tekton/build-args.env'
   pipelineSpec:
     description: |
       This pipeline is ideal for building container images from a Containerfile while reducing network traffic.