Merge pull request #34049 from jessfraz/update-cherry-pick-script-to-include-suject

Automatic merge from submit-queue

hack: Update cherry-pick script to include original PR subject

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**What this PR does / why we need it**:
Updates the cherrypick script to include the original PR subject.

We need it because I know nothing about the original PR based off a number and this is more expressive.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

**Special notes for your reviewer**:

**Release note**:
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hack/cherry_pick_pull.sh

@@ -111,6 +111,7 @@ function return_to_kansas {
 }
 trap return_to_kansas EXIT
 
+SUBJECTS=()
 function make-a-pr() {
   local rel="$(basename "${BRANCH}")"
   echo
@@ -125,6 +126,8 @@ function make-a-pr() {
 Automated cherry pick of ${PULLSUBJ}
 
 Cherry pick of ${PULLSUBJ} on ${rel}.
+
+$(printf '%s\n' "${SUBJECTS[@]}")
 EOF
 
   hub pull-request -F "${prtext}" -h "${GITHUB_USER}:${NEWBRANCH}" -b "kubernetes:${rel}"
@@ -165,6 +168,9 @@ for pull in "${PULLS[@]}"; do
       exit 1
     fi
   }
+  # set the subject
+  subject=$(grep "^Subject" "/tmp/${pull}.patch" | sed -e 's/Subject: \[PATCH\] //g')
+  SUBJECTS+=("#${pull}: ${subject}")
 done
 gitamcleanup=false