RHAIENG-1069: Build rstudio RPM from source, instead of using theirs

Author: ysok

.tekton/odh-workbench-rstudio-minimal-cpu-py312-rhel9-pull-request.yaml

@@ -39,7 +39,7 @@ spec:
     value:
     - linux/x86_64
   - name: dockerfile
-    value: rstudio/rhel9-python-3.12/Dockerfile.cpu
+    value: rstudio/rhel9-python-3.12/Dockerfile.konflux.cpu
   - name: path-context
     value: .
   - name: build-args-file

.tekton/odh-workbench-rstudio-minimal-cpu-py312-rhel9-push.yaml

@@ -29,7 +29,7 @@ spec:
   - name: output-image
     value: quay.io/opendatahub/odh-workbench-rstudio-minimal-cpu-py312-rhel9:{{revision}}
   - name: dockerfile
-    value: rstudio/rhel9-python-3.12/Dockerfile.cpu
+    value: rstudio/rhel9-python-3.12/Dockerfile.konflux.cpu
   - name: build-args-file
     value: rstudio/rhel9-python-3.12/build-args/cpu.conf
   - name: path-context