Mbed OS integration update (#10277)

* Update Mbed OS version in CHIP project
Update third_party/mbed-os/repo submodule branch
Improve apps and config CMakeLists files
Add .elf extension to executable file in launch.json

* Remove creating symlinks to Mbed OS , Mbed OS posix socket from build script
Improve examples CMakeLists files - use env variable to Mbed OS , Mbed OS posix socket and ISM43362 Wi-Fi

* Remove DISCO_L475VG_IOT01A board  and wifi-ism43362 lib from Mbed platform support

* Improve launch.json and task.json with Mbed supported boards

* Improve MBED_CONFIG_PATH and use it with mbed-tools configure

* Fix lock-app CMakeLists
Examples directory cleanup and gitignore update

* Fix setting project name in examples CMake files

* Update mbed-os-posix-socket revision

* mbed_app.json files cleanup
Fix setting custom BLE device name

* Changed restyle

* Improve error logging in apps main.cpp files

* Set printf_lib to std in examples mbed_app.json files

* Improve examples startup logging

* Fix file extension for artifact size verification inside mbed workflow

* Mbed unit tests changes for Mbed-os update

* Mbed config CMake file cleanup

* Disable some unit tests for mbed platform

* Changes restyle

* Improve application image extension in mbed build scripts

* Skip more test for mbed platform

* Changes restyle
diff --git a/.gitmodules b/.gitmodules
index b96aaab..f6e1af9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -86,11 +86,7 @@
 [submodule "third_party/mbed-os/repo"]
 	path = third_party/mbed-os/repo
 	url = https://github.com/ARMmbed/mbed-os.git
-	branch  = feature-chip
-[submodule "third_party/wifi-ism43362/repo"]
-	path = third_party/wifi-ism43362/repo
-	url = https://github.com/ATmobica/wifi-ism43362.git
-	branch  = master
+	branch = master
 [submodule "third_party/mbed-os-posix-socket/repo"]
 	path = third_party/mbed-os-posix-socket/repo
 	url = https://github.com/ARMmbed/mbed-os-posix-socket.git