Cherry pick #4610 (#4623)

Don't force users to sign trusted agreement.
Also, fix failing unittest.

src/appengine/handlers/upload_testcase.py

@@ -392,7 +392,9 @@ def do_post(self):
     trusted_agreement_signed = request.get(
         'trustedAgreement') == TRUSTED_AGREEMENT_TEXT.strip()
 
-    if (not trusted_agreement_signed and
+    # Chrome is the only ClusterFuzz deployment where there are trusted bots running utasks.
+    # This check also fails on oss-fuzz because of the way it abuses platform.
+    if (not trusted_agreement_signed and utils.is_chromium() and        
         task_utils.is_remotely_executing_utasks() and
         ((platform_id and platform_id != 'Linux') or
          job.platform.lower() != 'linux')):

src/clusterfuzz/_internal/tests/appengine/handlers/cron/project_setup_test.py

@@ -344,6 +344,7 @@ def test_execute(self):
         'SUMMARY_PREFIX = lib1\n'
         'MANAGED = True\n'
         'DISK_SIZE_GB = 500\n'
+        'ALLOW_UNPACK_OVER_HTTP = True\n'
         'REVISION_VARS_URL = https://commondatastorage.googleapis.com/'
         'clusterfuzz-builds/lib1/lib1-address-%s.srcmap.json\n'
         'FUZZ_LOGS_BUCKET = lib1-logs.clusterfuzz-external.appspot.com\n'
@@ -462,6 +463,7 @@ def test_execute(self):
         'SUMMARY_PREFIX = lib1\n'
         'MANAGED = True\n'
         'DISK_SIZE_GB = 500\n'
+        'ALLOW_UNPACK_OVER_HTTP = True\n'
         'REVISION_VARS_URL = https://commondatastorage.googleapis.com/'
         'clusterfuzz-builds-afl/lib1/lib1-address-%s.srcmap.json\n'
         'FUZZ_LOGS_BUCKET = lib1-logs.clusterfuzz-external.appspot.com\n'