fix: enable longpaths support for windows test (#1485) (#908)

Source-Link: googleapis/synthtool@7336562 Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-java:latest@sha256:d4b80feffe1579818cdc39466152e9de95789a193408506cd4a1ffbe8804dc00

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -14,4 +14,4 @@
 docker:
  image: gcr.io/cloud-devrel-public-resources/owlbot-java:latest
  digest: sha256:04f254abfe5f47fe73ae6f91d68d55c3b76e722a4943066c3bb0ce03573b4ad9
-# created: 2022-07-18T21:44:23.94208526Z
+# created: 2022-07-18T21:44:23.94208526Z