[Core Networking Tests] Changes to LegacyVpnTest and WifiTetheringTest

Change the WAIT_TIME to 5 seconds for IPv6 tethering
Update LegacyVpnTest to run from functional rigs and GCE

Test: Verified the changes
Bug: 73776268
Change-Id: I0a06cd694df2029c3751345b5cd25d31759f75e7
diff --git a/acts/tests/google/wifi/WifiTetheringTest.py b/acts/tests/google/wifi/WifiTetheringTest.py
index 26be9b7..915b25f 100644
--- a/acts/tests/google/wifi/WifiTetheringTest.py
+++ b/acts/tests/google/wifi/WifiTetheringTest.py
@@ -34,7 +34,7 @@
 from acts.test_utils.net import net_test_utils as nutils
 from acts.test_utils.wifi import wifi_test_utils as wutils
 
-WAIT_TIME = 2
+WAIT_TIME = 5
 
 class WifiTetheringTest(base_test.BaseTestClass):
     """ Tests for Wifi Tethering """
@@ -59,7 +59,6 @@
 
     def on_fail(self, test_name, begin_time):
         """ Collect bug report on failure """
-        return
         for ad in self.android_devices:
             ad.take_bug_report(test_name, begin_time)