Fixes #22917: add label to rudder-plugin docker images

ci/dep-check.Dockerfile

@@ -1,8 +1,8 @@
 ARG JDK_VERSION=11
 FROM maven:3-openjdk-${JDK_VERSION}
+LABEL ci=rudder/ci/dep-check.Dockerfile
 
 ARG USER_ID=1000
 COPY ci/user.sh .
-RUN ./user.sh $USER_ID
-
-RUN apt-get update && apt-get install -y make
+RUN ./user.sh $USER_ID ;\
+    apt-get update && apt-get install -y make

ci/plugins.Dockerfile

@@ -1,17 +1,18 @@
 ARG JDK_VERSION=11
 FROM maven:3-openjdk-${JDK_VERSION}
+LABEL ci=rudder/ci/plugins.Dockerfile
 
 ARG USER_ID=1000
 COPY ci/user.sh .
 RUN ./user.sh $USER_ID
 
 # Install elm
-RUN curl -L -o elm.gz "https://github.com/elm/compiler/releases/download/0.19.1/binary-for-linux-64-bit.gz"
-RUN gzip -d elm.gz
-RUN chmod +x elm
-RUN mv elm /usr/local/bin/elm-0.19.1
-RUN apt-get update && apt-get install -y npm
-RUN npm install terser@5.13.1 -g
+RUN curl -L -o elm.gz "https://github.com/elm/compiler/releases/download/0.19.1/binary-for-linux-64-bit.gz" ;\
+    gzip -d elm.gz ;\
+    chmod +x elm ;\
+    mv elm /usr/local/bin/elm-0.19.1 ;\
+    apt-get update && apt-get install -y npm ;\
+    npm install terser@5.13.1 -g
 
 # For building python plugins
-RUN apt-get update && apt-get install -y python3-docopt poppler-utils
+RUN apt-get update && apt-get install -y python3-docopt poppler-utils

ci/pylint.Dockerfile

@@ -1,3 +1,4 @@
 FROM python
+LABEL ci=rudder/ci/pylint.Dockerfile
 
 RUN pip install pylint

ci/shellcheck.Dockerfile

@@ -1,3 +1,4 @@
 FROM debian:11
+LABEL ci=rudder/ci/shellcheck.Dockerfile
 
 RUN apt-get update && apt-get install -y shellcheck

ci/typos.Dockerfile

@@ -1,4 +1,5 @@
 FROM rust
+LABEL ci=rudder/ci/typos.Dockerfile
 ARG VERSION
 
 RUN cargo install -f typos-cli --version =$VERSION