Silence CodeQL warning related to comparing uint8_t for loop index with a size_t pathsConfig.count (project-chip#37173)

in reality pathsConfig.count will never exceed 255 but since this is TestCode simplest is to make the loop condition index a size_t

Author: Alami-Amine

src/app/tests/suites/commands/interaction_model/InteractionModel.h

@@ -407,7 +407,7 @@ class InteractionModelWriter
                                                                     mTimedInteractionTimeoutMs, mSuppressResponse.ValueOr(false));
             VerifyOrReturnError(mWriteClient != nullptr, CHIP_ERROR_NO_MEMORY);
 
-            for (uint8_t i = 0; i < pathsConfig.count; i++)
+            for (size_t i = 0; i < pathsConfig.count; i++)
             {
                 auto & path        = pathsConfig.attributePathParams[i];
                 auto & dataVersion = pathsConfig.dataVersionFilter[i].mDataVersion;