RHAIENG-287: fix(Dockerfiles): use targeted inline suppression to avoid Hadolint DL3002 warning

```
./jupyter/trustyai/ubi9-python-3.12/Dockerfile.cpu:23 DL3002 warning: Last USER should not be root
./runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu:104 DL3002 warning: Last USER should not be root
./runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu:182 DL3002 warning: Last USER should not be root
./runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu:206 DL3002 warning: Last USER should not be root
./runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu:231 DL3002 warning: Last USER should not be root
./codeserver/ubi9-python-3.12/Dockerfile.cpu:12 DL3002 warning: Last USER should not be root
./codeserver/ubi9-python-3.12/Dockerfile.cpu:38 DL3002 warning: Last USER should not be root
```

Author: jiridanek

codeserver/ubi9-python-3.12/Dockerfile.cpu

@@ -12,6 +12,7 @@ FROM registry.access.redhat.com/ubi9/ubi AS ubi-repos
 # e.g., registry.access.redhat.com/ubi9/python-312:latest
 FROM ${BASE_IMAGE} AS rpm-base
 
+# hadolint ignore=DL3002
 USER root
 WORKDIR /root
 
@@ -38,6 +39,7 @@ RUN ./get_code_server_rpm.sh && touch /tmp/control
 #######################
 FROM registry.access.redhat.com/ubi9/python-312:latest AS whl-cache
 
+# hadolint ignore=DL3002
 USER root
 WORKDIR /root
 
@@ -287,5 +289,5 @@ set -Eeuxo pipefail
 python3 /tmp/test/test_startup.py 2>&1 | tee /tmp/test_log.txt
 EOF
 
-from codeserver
+FROM codeserver
 COPY --from=tests /tmp/test_log.txt /tmp/test_log.txt

jupyter/datascience/ubi9-python-3.12/Dockerfile.cpu

@@ -118,6 +118,7 @@ RUN curl -L https://mirror.openshift.com/pub/openshift-v4/$(uname -m)/clients/oc
 FROM cpu-base AS pyarrow-builder
 
 ARG TARGETARCH
+# hadolint ignore=DL3002
 USER 0
 WORKDIR /tmp/build-wheels
 
@@ -174,6 +175,7 @@ RUN --mount=type=cache,target=/root/.cache/pip \
 #######################################################
 FROM cpu-base AS common-builder
 ARG TARGETARCH
+# hadolint ignore=DL3002
 USER root
 RUN <<'EOF'
 set -Eeuxo pipefail

jupyter/trustyai/ubi9-python-3.12/Dockerfile.cpu

@@ -23,6 +23,7 @@ RUN cd ./mongodb-cli-mongocli-v${MONGOCLI_VERSION}/ && \
 ####################
 FROM ${BASE_IMAGE} AS whl-cache
 
+# hadolint ignore=DL3002
 USER root
 ENV HOME=/root
 WORKDIR /root

runtimes/datascience/ubi9-python-3.12/Dockerfile.cpu

@@ -113,6 +113,7 @@ RUN curl -L https://mirror.openshift.com/pub/openshift-v4/$(uname -m)/clients/oc
 FROM cpu-base AS s390x-builder
 
 ARG TARGETARCH
+# hadolint ignore=DL3002
 USER 0
 WORKDIR /tmp/build-wheels
 
@@ -191,6 +192,7 @@ RUN --mount=type=cache,target=/root/.cache/pip \
 ##################################
 
 FROM cpu-base AS openblas-builder
+# hadolint ignore=DL3002
 USER root
 WORKDIR /root
 
@@ -215,6 +217,7 @@ RUN if [ "$TARGETARCH" = "ppc64le" ]; then \
 ###################################
 
 FROM cpu-base AS onnx-builder
+# hadolint ignore=DL3002
 USER root
 WORKDIR /root
 
@@ -241,6 +244,7 @@ RUN if [ "$TARGETARCH" = "ppc64le" ]; then \
 ##################################
 
 FROM cpu-base AS arrow-builder
+# hadolint ignore=DL3002
 USER root
 WORKDIR /root