Add logs in google issue tracker to facilitate debug (#5067)

Log the issue data before calling the issue tracker API to create a new
issue to facilitate debugging. Also, log the file_exception as a
structured field when it fails.

Author: ViniciustCosta

src/clusterfuzz/_internal/cron/triage.py

@@ -361,7 +361,9 @@ def _file_issue(testcase, issue_tracker, throttler):
     file_exception = e
 
   if file_exception:
-    logs.error(f'Failed to file issue for testcase {testcase.key.id()}.')
+    logs.error(
+        f'Failed to file issue for testcase {testcase.key.id()}.',
+        file_exception=file_exception)
     monitoring_metrics.ISSUE_FILING.increment({
         'fuzzer_name': testcase.fuzzer_name,
         'status': 'failed',

src/clusterfuzz/_internal/issue_management/google_issue_tracker/issue_tracker.py

@@ -809,10 +809,11 @@ def save(self, new_comment=None, notify=True, skip_emails=[]):  # pylint: disabl
         self._data['issueComment'] = {
             'comment': self._body,
         }
+      logs.info(f'google_issue_tracker: issue body before create: {self._data}')
       result = self.issue_tracker._execute(
           self.issue_tracker.client.issues().create(
               body=self._data, templateOptions_applyTemplate=True))
-      logs.info('google_issue_tracker: result of create: %s' % result)
+      logs.info(f'google_issue_tracker: result of create: {result}')
       self._is_new = False
     else:
       logs.info('google_issue_tracker: Updating issue..')