Update test build logic for WASM

Simplifies test build configuration by enabling tests only when not targeting WASM, removing the OTCLIENT_BUILD_TESTS option and related logic.

Author: dudantas

CMakeLists.txt

@@ -105,14 +105,7 @@ add_subdirectory(src/protobuf)
 # Src
 add_subdirectory(src)
 
-set(OTCLIENT_BUILD_TESTS_DEFAULT ON)
-if(WASM)
-        set(OTCLIENT_BUILD_TESTS_DEFAULT OFF)
-endif()
-
-option(OTCLIENT_BUILD_TESTS "Build unit tests" ${OTCLIENT_BUILD_TESTS_DEFAULT})
-
-if(OTCLIENT_BUILD_TESTS)
+if(NOT WASM)
     enable_testing()
     add_subdirectory(tests)
     log_option_enabled("Build tests")