CMake: Move connectivity/cellular stubs to the mbed-os/connectivity/cellular dir

Move the connectivity cellular into the connectivity/cellular component
directory. So we can avoid duplicating the mbed-os source tree in a
central UNITTESTS folder.

Author: rajkan01

UNITTESTS/stubs/connectivity/CMakeLists.txt

@@ -7,8 +7,6 @@ target_compile_definitions(mbed-stubs-connectivity
     PRIVATE
         DEVICE_SERIAL=1
         DEVICE_INTERRUPTIN=1
-        MBED_CONF_CELLULAR_USE_SMS=1
-        MBED_CONF_NSAPI_DEFAULT_CELLULAR_APN=NULL
         MBED_CONF_PLATFORM_DEFAULT_SERIAL_BAUD_RATE=115200
         MBED_CONF_LORA_OVER_THE_AIR_ACTIVATION=true
         MBED_CONF_LORA_AUTOMATIC_UPLINK_MESSAGE=true
@@ -21,19 +19,7 @@ target_compile_definitions(mbed-stubs-connectivity
 target_sources(mbed-stubs-connectivity
     PRIVATE
         aes_stub.c
-        AT_CellularContext_stub.cpp
-        AT_CellularDevice_stub.cpp
-        AT_CellularInformation_stub.cpp
-        AT_CellularNetwork_stub.cpp
-        AT_CellularSMS_stub.cpp
-        AT_CellularStack_stub.cpp
-        AT_ControlPlane_netif_stub.cpp
-        ATHandler_stub.cpp
-        CellularContext_stub.cpp
-        CellularDevice_stub.cpp
         CellularInterface_stub.cpp
-        CellularStateMachine_stub.cpp
-        CellularUtil_stub.cpp
         cipher_stub.c
         cmac_stub.c
         ip4tos_stub.c

connectivity/cellular/tests/UNITTESTS/CMakeLists.txt

@@ -1,4 +1,5 @@
 # Copyright (c) 2021 ARM Limited. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
+add_subdirectory(doubles)
 add_subdirectory(framework)

UNITTESTS/stubs/connectivity/ATHandler_stub.cpp renamed to connectivity/cellular/tests/UNITTESTS/doubles/ATHandler_stub.cpp

@@ -171,7 +171,8 @@ bool AT_CellularContext::get_context()
     return true;
 }
 
-const char* AT_CellularContext::get_nonip_context_type_str() {
+const char *AT_CellularContext::get_nonip_context_type_str()
+{
     return "Non-IP";
 }
 

UNITTESTS/stubs/connectivity/AT_CellularContext_stub.cpp renamed to connectivity/cellular/tests/UNITTESTS/doubles/AT_CellularContext_stub.cpp

@@ -31,7 +31,7 @@ AT_CellularStack::~AT_CellularStack()
 {
 }
 
-nsapi_error_t AT_CellularStack::get_ip_address(SocketAddress* address)
+nsapi_error_t AT_CellularStack::get_ip_address(SocketAddress *address)
 {
     return NSAPI_ERROR_UNSUPPORTED;
 }