RHAIENG-5164: build: use Dockerfile.konflux.* in .tekton and Makefile (#3978)

Point ODH Konflux pipelines and local make builds at canonical
Dockerfile.konflux.* paths while keeping symlink files for a follow-up
removal PR. KONFLUX still selects build-args conf files only.

* RHAIENG-5164: build: drop realpath and tighten makefile_helper test

Build Dockerfile.konflux.* directly with wildcard existence check; assert
--file and build-args conf selection in makefile_helper for both KONFLUX
modes.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: jiridanek

.tekton/odh-pipeline-runtime-datascience-cpu-py312-ubi9-ci-push.yaml

@@ -25,7 +25,7 @@ spec:
   - name: output-image
     value: quay.io/opendatahub/odh-pipeline-runtime-datascience-cpu-py312-ubi9:odh-stable
   - name: dockerfile
-    value: runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu
+    value: runtimes/datascience/ubi9-python-3.12/Dockerfile.konflux.cpu
   - name: build-args-file
     value: runtimes/datascience/ubi9-python-3.12/build-args/cpu.conf
   - name: path-context

.tekton/odh-pipeline-runtime-datascience-cpu-py312-ubi9-pull-request.yaml

@@ -41,7 +41,7 @@ spec:
     - linux/ppc64le
     - linux/s390x
   - name: dockerfile
-    value: runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu
+    value: runtimes/datascience/ubi9-python-3.12/Dockerfile.konflux.cpu
   - name: path-context
     value: .
   - name: build-args-file

.tekton/odh-pipeline-runtime-datascience-cpu-py312-ubi9-push.yaml

@@ -33,7 +33,7 @@ spec:
     - linux/ppc64le
     - linux/s390x
   - name: dockerfile
-    value: runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu
+    value: runtimes/datascience/ubi9-python-3.12/Dockerfile.konflux.cpu
   - name: build-args-file
     value: runtimes/datascience/ubi9-python-3.12/build-args/cpu.conf
   - name: path-context

.tekton/odh-pipeline-runtime-minimal-cpu-py312-ubi9-ci-push.yaml

@@ -25,7 +25,7 @@ spec:
   - name: output-image
     value: quay.io/opendatahub/odh-pipeline-runtime-minimal-cpu-py312-ubi9:odh-stable
   - name: dockerfile
-    value: runtimes/minimal/ubi9-python-3.12/Dockerfile.cpu
+    value: runtimes/minimal/ubi9-python-3.12/Dockerfile.konflux.cpu
   - name: build-args-file
     value: runtimes/minimal/ubi9-python-3.12/build-args/cpu.conf
   - name: path-context

.tekton/odh-pipeline-runtime-minimal-cpu-py312-ubi9-pull-request.yaml

@@ -41,7 +41,7 @@ spec:
     - linux/ppc64le
     - linux/s390x
   - name: dockerfile
-    value: runtimes/minimal/ubi9-python-3.12/Dockerfile.cpu
+    value: runtimes/minimal/ubi9-python-3.12/Dockerfile.konflux.cpu
   - name: path-context
     value: .
   - name: build-args-file

.tekton/odh-pipeline-runtime-minimal-cpu-py312-ubi9-push.yaml

@@ -33,7 +33,7 @@ spec:
     - linux/ppc64le
     - linux/s390x
   - name: dockerfile
-    value: runtimes/minimal/ubi9-python-3.12/Dockerfile.cpu
+    value: runtimes/minimal/ubi9-python-3.12/Dockerfile.konflux.cpu
   - name: build-args-file
     value: runtimes/minimal/ubi9-python-3.12/build-args/cpu.conf
   - name: path-context

.tekton/odh-pipeline-runtime-pytorch-cuda-py312-ubi9-ci-push.yaml

@@ -27,7 +27,7 @@ spec:
   - name: output-image
     value: quay.io/opendatahub/odh-pipeline-runtime-pytorch-cuda-py312-ubi9:odh-stable
   - name: dockerfile
-    value: runtimes/pytorch/ubi9-python-3.12/Dockerfile.cuda
+    value: runtimes/pytorch/ubi9-python-3.12/Dockerfile.konflux.cuda
   - name: build-args-file
     value: runtimes/pytorch/ubi9-python-3.12/build-args/cuda.conf
   - name: path-context

.tekton/odh-pipeline-runtime-pytorch-cuda-py312-ubi9-pull-request.yaml

@@ -37,7 +37,7 @@ spec:
     value:
     - linux-d160-m4xlarge/amd64
   - name: dockerfile
-    value: runtimes/pytorch/ubi9-python-3.12/Dockerfile.cuda
+    value: runtimes/pytorch/ubi9-python-3.12/Dockerfile.konflux.cuda
   - name: path-context
     value: .
   - name: event-type

.tekton/odh-pipeline-runtime-pytorch-cuda-py312-ubi9-push.yaml

@@ -31,7 +31,7 @@ spec:
     value:
     - linux-d160-m4xlarge/amd64
   - name: dockerfile
-    value: runtimes/pytorch/ubi9-python-3.12/Dockerfile.cuda
+    value: runtimes/pytorch/ubi9-python-3.12/Dockerfile.konflux.cuda
   - name: build-args-file
     value: runtimes/pytorch/ubi9-python-3.12/build-args/cuda.conf
   - name: path-context

.tekton/odh-pipeline-runtime-pytorch-llmcompressor-cuda-py312-ci-push.yaml

@@ -27,7 +27,7 @@ spec:
   - name: output-image
     value: quay.io/opendatahub/odh-pipeline-runtime-pytorch-llmcompressor-cuda-py312-ubi9:odh-stable
   - name: dockerfile
-    value: runtimes/pytorch+llmcompressor/ubi9-python-3.12/Dockerfile.cuda
+    value: runtimes/pytorch+llmcompressor/ubi9-python-3.12/Dockerfile.konflux.cuda
   - name: build-args-file
     value: runtimes/pytorch+llmcompressor/ubi9-python-3.12/build-args/cuda.conf
   - name: path-context