ci: output-capture commands ignore stderr

Any error should be already printed in the previous dry run

ci-scripts/kurento_get_version.sh

@@ -98,7 +98,7 @@ elif [[ -f pom.xml ]]; then
 
     log "REAL RUN. Suppressing Maven logs, just get the result:" >&2
     MAVEN_CMD+=(--quiet)
-    PROJECT_VERSION="$("${MAVEN_CMD[@]}")" || {
+    PROJECT_VERSION="$("${MAVEN_CMD[@]}" 2>/dev/null)" || {
         log "ERROR: Command failed: mvn echo \${project.version}" >&2
         exit 1
     }

ci-scripts/kurento_maven_deploy_github.sh

@@ -61,22 +61,20 @@ mvn "${MVN_ARGS[@]}" install || {
 }
 
 # For each submodule, go into its path and delete the current GitHub version.
-MVN_DIRS=()
-{
-    MAVEN_CMD=(mvn "${MVN_ARGS[@]}" exec:exec -Dexec.executable=pwd)
-
-    # 2024-05-22: This command was failing on CI, and errors were suppressed.
-    # Adding an initial dry run, to be able to see errors in the output logs.
-    log "DRY RUN. Showing Maven logs:"
-    "${MAVEN_CMD[@]}"
-
-    log "REAL RUN. Suppressing Maven logs, just get the result:"
-    MAVEN_CMD+=(--quiet)
-    # shellcheck disable=SC2207
-    MVN_DIRS=($("${MAVEN_CMD[@]}")) || {
-        log "ERROR: Command failed: mvn exec pwd"
-        exit 1
-    }
+MAVEN_CMD=(mvn "${MVN_ARGS[@]}" exec:exec -Dexec.executable=pwd)
+
+# 2024-05-22: This command was failing on CI, and errors were suppressed.
+# Use an initial dry run, to be able to see errors in the output logs.
+log "DRY RUN. Showing Maven logs:"
+"${MAVEN_CMD[@]}"
+
+log "REAL RUN. Suppressing Maven logs, just get the result:"
+MAVEN_CMD+=(--quiet)
+
+# shellcheck disable=SC2207
+MVN_DIRS=($("${MAVEN_CMD[@]}" 2>/dev/null)) || {
+    log "ERROR: Command failed: mvn exec pwd"
+    exit 1
 }
 
 for MVN_DIR in "${MVN_DIRS[@]}"; do