[EFR32] Implement the CommisionableData Provider (#22705)

* WIP

* WIP Add the Commisionable Data provide to the ligthing-app

* Fix reading potential garbage bytes. Create python script to inject commissionable data to a efr32 device

* Add EFR32CommissinableDataProvider to all silabs examples. Add a fallback to use TEST_SETUP_VALUES if credentials are not found in nvm3. Add a Readme for the provider script.

* Fix typo and add a subscript in the readme.md

* Create a class and remove the use of global variables. Fix other comments

* fix merge conflict, run restyle

* Remove Passcode storing, Instead store qrcode bitset payload. Support deviceInstanceInfoProvider, augment FactoryDataProvider and add checks

* Add commissioning flow and rendez-vous flag args to the factoryDataProvider script

* fix build issue

* Enable EFR32DeviceDataProvider for the wifi platform examples also

* address last few comments
diff --git a/src/platform/EFR32/EFR32Config.cpp b/src/platform/EFR32/EFR32Config.cpp
index 1abd6cf..ff6a34c 100644
--- a/src/platform/EFR32/EFR32Config.cpp
+++ b/src/platform/EFR32/EFR32Config.cpp
@@ -84,7 +84,7 @@
     CHIP_ERROR err;
     uint32_t objectType;
     size_t dataLen;
-    bool tmpVal;
+    bool tmpVal = 0;
 
     VerifyOrExit(ValidConfigKey(key), err = CHIP_DEVICE_ERROR_CONFIG_NOT_FOUND); // Verify key id.
 
@@ -106,7 +106,7 @@
     CHIP_ERROR err;
     uint32_t objectType;
     size_t dataLen;
-    uint32_t tmpVal;
+    uint32_t tmpVal = 0;
 
     VerifyOrExit(ValidConfigKey(key), err = CHIP_DEVICE_ERROR_CONFIG_NOT_FOUND); // Verify key id.
 
@@ -128,7 +128,7 @@
     CHIP_ERROR err;
     uint32_t objectType;
     size_t dataLen;
-    uint64_t tmpVal;
+    uint64_t tmpVal = 0;
 
     VerifyOrExit(ValidConfigKey(key), err = CHIP_DEVICE_ERROR_CONFIG_NOT_FOUND); // Verify key id.
 
@@ -264,8 +264,8 @@
 CHIP_ERROR EFR32Config::ReadConfigValueCounter(uint8_t counterIdx, uint32_t & val)
 {
     CHIP_ERROR err;
-    uint32_t tmpVal;
-    Key key = kMinConfigKey_MatterCounter + counterIdx;
+    uint32_t tmpVal = 0;
+    Key key         = kMinConfigKey_MatterCounter + counterIdx;
 
     VerifyOrExit(ValidConfigKey(key), err = CHIP_DEVICE_ERROR_CONFIG_NOT_FOUND); // Verify key id.