Fix corpora download error for linux-x64-fuzzilli-coverage

Use 'gsutil' instead of 'gsutil.py' as the latter is not available
on the bots.

Also do not catch the exception so that the actual failure message
can be shown on the step.

Bug: 395162693
Change-Id: I15546c71215970407a2934382bcb56092f0c9aba
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6314982
Reviewed-by: Prakhar Asthana <[email protected]>
Commit-Queue: Weizhong Xia <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1427422}
NOKEYCHECK=True
GitOrigin-RevId: 78efe54ab4d7a2ba6a0a3edbd69c912696879d12
1 file changed