[PLAT-8624] Metrics not populated after yugabundle restore

Summary:
Issue when restoring from yugabundle to yba-installer with prometheus metrics. Swamper target files
were not getting copied over properly. This diff fixes that by copying the targets explicitly over
from the yugabackup directory (where we untar yugabundle backup) to the correct location. This is
normally not a problem for backup restore because we untar directly in the destination so those
files get written.

Test Plan:
try yugabundle -> yba-installer backup/restore and verify swamper targets exist with right
permissions and metrics show up in UI
Verify same for yba-installer -> yba-installer

Reviewers: sanketh, dshubin

Reviewed By: dshubin

Subscribers: jenkins-bot, yugaware

Differential Revision: https://phabricator.dev.yugabyte.com/D24877

managed/devops/bin/yb_platform_backup.sh

@@ -567,14 +567,14 @@ restore_backup() {
   modify_service yb-platform stop
 
   db_backup_path="${destination}/${PLATFORM_DUMP_FNAME}"
+  yugabackup="${destination}"/"${YUGABUNDLE_BACKUP_DIR}"
   trap 'delete_db_backup ${db_backup_path}' RETURN
   tar_cmd="tar -xzf"
   if [[ "${verbose}" = true ]]; then
     tar_cmd="tar -xzvf"
   fi
   if [[ "${yugabundle}" = true ]]; then
     # Copy over yugabundle backup data into the correct yba-installer paths
-    yugabackup="${destination}"/"${YUGABUNDLE_BACKUP_DIR}"
     db_backup_path="${yugabackup}"/"${PLATFORM_DUMP_FNAME}"
     rm -rf "${yugabackup}"
     mkdir -p "${yugabackup}"
@@ -615,11 +615,15 @@ restore_backup() {
     modify_service prometheus stop
     run_sudo_cmd "rm -rf ${PROMETHEUS_DATA_DIR}/*"
     if [[ "${yba_installer}" = true ]] && [[ "${yugabundle}" = true ]]; then
-      run_sudo_cmd "mv ${destination}/${YUGABUNDLE_BACKUP_DIR}/${PROMETHEUS_SNAPSHOT_DIR}/*/* \
+      run_sudo_cmd "mv ${yugabackup}/${PROMETHEUS_SNAPSHOT_DIR}/*/* \
       ${PROMETHEUS_DATA_DIR}"
+      backup_targets=$(find "${yugabackup}" -name swamper_targets -type d)
+      run_sudo_cmd "cp -Tr ${backup_targets} ${destination}/data/prometheus/swamper_targets"
+      run_sudo_cmd "chown -R ${yba_user}:${yba_user} ${destination}/data/prometheus"
     elif [[ "${yba_installer}" = true ]]; then
       run_sudo_cmd "mv ${destination}/${PROMETHEUS_SNAPSHOT_DIR}/*/* ${PROMETHEUS_DATA_DIR}"
       run_sudo_cmd "rm -rf ${destination}/${PROMETHEUS_SNAPSHOT_DIR}"
+      run_sudo_cmd "chown -R ${yba_user}:${yba_user} ${destination}/data/prometheus"
     else
       run_sudo_cmd "mv ${destination}/${PROMETHEUS_SNAPSHOT_DIR}/* ${PROMETHEUS_DATA_DIR}"
     fi