[SPARK-52276][BUILD] Make ANSWER not to be overwritten in release scripts

### What changes were proposed in this pull request?

This PR is rather a followup of d7d8b24 . This PR makes ANSWER not to be overwritten in release scripts.

### Why are the changes needed?

ANSWER should not be overwritten.

### Does this PR introduce _any_ user-facing change?

No, dev-only.

### How was this patch tested?

Manually ran the script.

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #50995 from HyukjinKwon/SPARK-52225-followup3.

Authored-by: Hyukjin Kwon <gurwls223@apache.org>
Signed-off-by: Hyukjin Kwon <gurwls223@apache.org>

Author: HyukjinKwon

dev/create-release/do-release-docker.sh

@@ -72,19 +72,23 @@ fi
 
 if [ -d "$WORKDIR/output" ]; then
   if [ -z "$ANSWER" ]; then
-    read -p "Output directory already exists. Overwrite and continue? [y/n] " ANSWER
-  fi
-  if [ "$ANSWER" != "y" ]; then
+    read -p "Output directory already exists. Overwrite and continue? [y/n] " userinput
+    if [ "$userinput" != "y" ]; then
+      error "Exiting."
+    fi
+  elif [ "$ANSWER" != "y" ]; then
     error "Exiting."
   fi
 fi
 
 if [ ! -z "$RELEASE_STEP" ] && [ "$RELEASE_STEP" = "finalize" ]; then
   echo "THIS STEP IS IRREVERSIBLE! Make sure the vote has passed and you pick the right RC to finalize."
   if [ -z "$ANSWER" ]; then
-    read -p "You must be a PMC member to run this step. Continue? [y/n] " ANSWER
-  fi
-  if [ "$ANSWER" != "y" ]; then
+    read -p "You must be a PMC member to run this step. Continue? [y/n] " userinput
+    if [ "$userinput" != "y" ]; then
+      error "Exiting."
+    fi
+  elif [ "$ANSWER" != "y" ]; then
     error "Exiting."
   fi
 
@@ -163,7 +167,7 @@ if [ -n "$JAVA" ]; then
 fi
 
 echo "Building $RELEASE_TAG; output will be at $WORKDIR/output"
-docker $([ -z "$GITHUB_ACTIONS" ] && echo "-ti") run \
+docker run $([ -z "$GITHUB_ACTIONS" ] && echo "-ti") \
   --env-file "$ENVFILE" \
   --volume "$WORKDIR:/opt/spark-rm" \
   $JAVA_VOL \

dev/create-release/release-util.sh

@@ -150,9 +150,11 @@ function get_release_info {
   SKIP_TAG="${SKIP_TAG:-0}"
   if check_for_tag "$RELEASE_TAG" && [[ $SKIP_TAG = 0 ]]; then
     if [ -z "$ANSWER" ]; then
-      read -p "$RELEASE_TAG already exists. Continue anyway [y/n]? " ANSWER
-    fi
-    if [ "$ANSWER" != "y" ]; then
+      read -p "$RELEASE_TAG already exists. Continue anyway [y/n]? " userinput
+      if [ "$userinput" != "y" ]; then
+        error "Exiting."
+      fi
+    elif [ "$ANSWER" != "y" ]; then
       error "Exiting."
     fi
     SKIP_TAG=1
@@ -201,11 +203,12 @@ E-MAIL:     $GIT_EMAIL
 EOF
 
   if [ -z "$ANSWER" ]; then
-    read -p "Is this info correct [y/n]? " ANSWER
-  fi
-  if [ "$ANSWER" != "y" ]; then
-    echo "Exiting."
-    exit 1
+    read -p "Is this info correct [y/n]? " userinput
+    if [ "$userinput" != "y" ]; then
+      error "Exiting."
+    fi
+  elif [ "$ANSWER" != "y" ]; then
+    error "Exiting."
   fi
 
   if ! is_dry_run; then