fix: enable longpaths support for windows test (#1485) (#401)

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:b2e8f445ca0e605d4bbefbfdbdf7335692d75cf1647af62243828dcc0ea4e690
-# created: 2022-07-14T21:08:10.768472192Z
+# created: 2022-07-14T21:08:10.768472192Z