Fix GAP/SEC/AUT/BV-19-C

WID108 appears twice in a row for this test with different descritpions.
The point is to call gap_pair command only once. This was also the case
for test GAP/BOND/BON/BV-02-C, which was explained by sjanc:
"On Zephyr second call is just a NOP (since encryption is already enabled),
but in NimBLE this results in re-encrypting link with existing LTK which
confuses PTS due to unexpected HCI event."

autopts/wid/gap.py

@@ -505,7 +505,7 @@ def hdl_wid_106(params: WIDParams):
 
 
 def hdl_wid_108(params: WIDParams):
-    if params.test_case_name in ['GAP/BOND/BON/BV-02-C']:
+    if params.test_case_name in ['GAP/BOND/BON/BV-02-C', 'GAP/SEC/AUT/BV-19-C']:
         if params.description.startswith('Please configure the IUT into LE Security and start pairing process.'):
             return True