Convert nanostack and lwipstack to STATIC libraries

Corrected nanostack coverity warnings

Replaced new calls with nothrow version of the call on mesh api ...

Replaced new calls with nothrow version of the call.

CMake: Rename CMake targets ...

* mbed-os renamed mbed-core
* mbed-os-<COMPONENT> renamed mbed-<COMPONENT>

CMake: Componentize Mbed OS into multiple CMake targets (#13732) ...

Aside from the core mbed-os CMake target, a number of targets have been created so they can optionally be included by application executables that require them using `target_link_libraries()`.

Co-authored-by: Martin Kojtal <martin.kojtal@arm.com>
Co-authored-by: Rajkumar Kanagaraj <rajkumar.kanagaraj@arm.com>

CMake: Fix build failure due to nanostack dir move

nanostack: fix inclusion of kvstore ...

Protect kvstore headers as well as they should not be included if kvstore is not enabled
in nanostack file system.

Mbed OS will soon be changing directory structure to the below: ...

```
connectivity
├── netsocket
├── lwipstack
├── nanostack
│   ├── mbed_lib.json // nanostack-interface's mbed_lib.json
│   ├── include
│   │   └── nanostack // headers from features/netsocket/nanostack-interface
│   ├── source        // sources from features/netsocket/nanostack-interface
│   ├── coap-service  // used by Thread only - deprecate?
│   ├── mbed-mesh-api
│   ├── nanostack-hal-mbed-cmsis-rtos // HAL porting layer for Nanostack on mbed with CMSIS-RTOS
│   ├── sal-stack-nanostack
│   └── sal-stack-nanostack-eventloop
├── cellular                // previously in features/cellular/framework/
├── ...

```

This PR is a part of a wider \connectivity refactoring and implements the above new directory structure for \nanostack.