unit/test-gatt: Add /TP/GAR/CL/BI-04-C/auto test
unit/test-gatt: Add /TP/GAR/CL/BI-04-C/auto test

/TP/GAR/CL/BI-04-C/auto is similar to TP/GAR/CL/BI-04-C but automatically
elevates the security level and retry.

silent-snowman/bluez,pkarasev3/bluez,pkarasev3/bluez,pstglia/external-bluetooth-bluez,pkarasev3/bluez,ComputeCycles/bluez,pkarasev3/bluez,pstglia/external-bluetooth-bluez,silent-snowman/bluez,ComputeCycles/bluez,silent-snowman/bluez,ComputeCycles/bluez,silent-snowman/bluez,ComputeCycles/bluez,pstglia/external-bluetooth-bluez,pstglia/external-bluetooth-bluez