Add --warning-mode all to all our builds

I have done this for prb, and fixed the issues it found, now
we need to expand it to other jobs, namely nightly and release.

This is part of the work to upgrade to gradle 8: FoundationDB#3242

Author: ScottDugas

actions/run-gradle/action.yml

@@ -13,4 +13,4 @@ runs:
       run: sed -i -e "s/^org\.gradle\..*/#&/g" gradle.properties
     - name: Run Command
       shell: bash
-      run: GRADLE_OPTS="-XX:+HeapDumpOnOutOfMemoryError -Xverify:none -XX:+TieredCompilation -Xmx4096m -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED" ./gradlew --no-daemon --console=plain ${{ inputs.gradle_command }}
+      run: GRADLE_OPTS="-XX:+HeapDumpOnOutOfMemoryError -Xverify:none -XX:+TieredCompilation -Xmx4096m -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED" ./gradlew --no-daemon --console=plain  --warning-mode all ${{ inputs.gradle_command }}