[toranj-config] explicitly enable OPENTHREAD_CONFIG_TLS_ENABLE (ope…

…nthread#10773)

This commit explicitly enables the `OPENTHREAD_CONFIG_TLS_ENABLE`
macro in `core-toranj-config.h`. This configuration is used to
generate a custom `openthread-mbedtls-config.h` using the `unifdef`
command in `mbedtls/CMakeLists.txt`. Some versions of `unifdef` do
not expand macros first and expect the macro to be defined as a
simple number. This change ensures the build is successful.

tests/toranj/openthread-core-toranj-config.h

@@ -66,6 +66,8 @@
 
 #define OPENTHREAD_CONFIG_BLE_TCAT_ENABLE 1
 
+#define OPENTHREAD_CONFIG_TLS_ENABLE 1
+
 #define OPENTHREAD_CONFIG_COMMISSIONER_ENABLE 1
 
 #define OPENTHREAD_CONFIG_COMMISSIONER_MAX_JOINER_ENTRIES 4