Remove git reset - replace with git stash (#40669)

scripts/drone/steps/lib.star

@@ -1011,7 +1011,8 @@ def ensure_cuetsified_step():
         ],
         'commands': [
             '# Make sure the git tree is clean.',
-            'git reset --hard',
+            '# Stashing changes, since packages that were produced in build-backend step are needed.',
+            'git stash',
             './bin/linux-amd64/grafana-cli cue gen-ts --grafana-root .',
             '# The above command generates Typescript files (*.gen.ts) from all appropriate .cue files.',
             '# It is required that the generated Typescript be in sync with the input CUE files.',
@@ -1019,5 +1020,7 @@ def ensure_cuetsified_step():
             './node_modules/.bin/eslint . --ext .gen.ts --fix',
             '# If any filenames are emitted by the below script, run the generator command `grafana-cli cue gen-ts` locally and commit the result.',
             './scripts/clean-git-or-error.sh',
+            '# Un-stash changes.',
+            'git stash pop',
         ],
     }