tools: increase test timeouts

At least temporarily until snapshots are restored, increase timeout for
tests. Tests that spawn many processes are timing out across many
platforms on CI.

PR-URL: #14197
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

tools/test.py

@@ -1370,7 +1370,7 @@ def BuildOptions():
   result.add_option("-s", "--suite", help="A test suite",
       default=[], action="append")
   result.add_option("-t", "--timeout", help="Timeout in seconds",
-      default=60, type="int")
+      default=120, type="int")
   result.add_option("--arch", help='The architecture to run tests for',
       default='none')
   result.add_option("--snapshot", help="Run the tests with snapshot turned on",