fix(ng-dev): downgrade @google-cloud/spanner to 8.0.0 (#2947)

See: googleapis/nodejs-spanner#2375

PR Close #2947

Author: alan-agius4

.aspect/rules/external_repository_action_cache/npm_translate_lock_LTkzNjczMzk3Mw==

@@ -20,7 +20,7 @@ github-actions/pull-request-labeling/package.json=-197755049
 github-actions/saucelabs/package.json=855472374
 github-actions/unified-status-check/package.json=-337882335
 ng-dev/package.json=1323489217
-package.json=-791801366
-pnpm-lock.yaml=-1788436055
+package.json=-1943466869
+pnpm-lock.yaml=1376788065
 pnpm-workspace.yaml=1110472849
-yarn.lock=-598328143
+yarn.lock=-1532471435

package.json

@@ -70,7 +70,7 @@
     "@bazel/ibazel": "^0.25.0",
     "@bazel/jasmine": "5.8.1",
     "@google-cloud/firestore": "^7.0.0",
-    "@google-cloud/spanner": "8.1.0",
+    "@google-cloud/spanner": "8.0.0",
     "@google-cloud/storage": "^7.0.0",
     "@inquirer/prompts": "^7.0.0",
     "@inquirer/type": "^3.0.0",