Comply with Policy for AI Generated Content

While probably not meeting most people's definition of artificial
intelligence these scripts do create patches. The OpenInfra Policy
for AI Generated Content recommends to:

> Add a "Generated-By:" label to the commit message, and explain in
> comments or the commit message any prompts or background context
> the reviewers might need to fully understand the change and how
> much of the change was generated by the tool.

Even though it also has a carve-out for these sorts of scripts:

> The exception to the rule is that we do allow submissions from
> well documented automated processes, such as release tooling or
> for internationalization updates.

https://openinfra.org/legal/ai-policy

Nevertheless, documenting within the commit message the location of
the script which was used to generate that contribution is helpful
for a number of obvious reasons. Let's do it anyway, even though
it's not technically required.

Change-Id: Id798bba638543cf8e9573c10e85495e7cc436237

tools/bulk_review.sh

@@ -101,7 +101,8 @@ for team in "${!files_by_team_release[@]}" ; do
     git add ${files_by_team_release[$team]}
     git commit -s\
         -m "[$team] $subject" \
-        -m "$body"
+        -m "$body" \
+        --trailer="Generated-By:openstack/releases:tools/bulk_review.sh"
 
     git stash
     git checkout master

tools/functions

@@ -75,7 +75,8 @@ function update_gitreview {
 defaultbranch=$branch"
     echo "$grcontents" > .gitreview
     git add .gitreview
-    git commit -s -m "Update .gitreview for $branch"
+    git commit -s -m "Update .gitreview for $branch" \
+        --trailer="Generated-By:openstack/releases:tools/functions"
     git show
     local shortbranch=$(basename $branch)
     git review -t "create-${shortbranch}"
@@ -93,7 +94,8 @@ function update_upper_constraints {
     sed -i~ -e "s,-c.*{\(env:UPPER_CONSTRAINTS_FILE\)[^ ]*},-c{\1:$uc_url}," tox.ini
     if ! git diff --exit-code >/dev/null 2>&1 ; then
         git add tox.ini
-        git commit -s -m "Update UPPER_CONSTRAINTS_FILE for $branch"
+        git commit -s -m "Update UPPER_CONSTRAINTS_FILE for $branch" \
+            --trailer="Generated-By:openstack/releases:tools/functions"
         git show
         local shortbranch=$(basename $branch)
         git review -t "create-${shortbranch}"

tools/process_auto_releases.sh

@@ -154,7 +154,8 @@ $(git log --oneline --no-merges ${prev_tag}..${end_sha})
     done
     git add .
     message="${commit//PROJECT/$repo}${change_list}"
-    git commit -s -m "$message"
+    git commit -s -m "$message" \
+        --trailer="Generated-By:openstack/releases:tools/process_auto_releases.sh"
     git log -1
     git review -t $topic
     git reset --hard HEAD~1 > /dev/null