feature: Optimize RAM example binaries for size

In order to reduce the amount of flash needed for users to run the
RAM examples, we optimize these for size.

examples/binaries/RAM_APP/source/sdkconfig.defaults

@@ -2,6 +2,7 @@
 # Espressif IoT Development Framework (ESP-IDF) Project Minimal Configuration
 #
 CONFIG_APP_BUILD_TYPE_ELF_RAM=y
+CONFIG_COMPILER_OPTIMIZATION_SIZE=y
 CONFIG_APP_NO_BLOBS=y
 CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_DISABLE=y
 CONFIG_COMPILER_OPTIMIZATION_CHECKS_SILENT=y