Some component test apps do not use the "set(COMPONENTS main)" command in their
project level "CMakeLists.txt", thus leading to their builds pulling in all
ESP-IDF components.
This commit trims the build of multiple component test apps:
- Add "set(COMPONENTS main ...)" to project level "CMakeLists.txt"
- Add missing "PRIV_REQUIRES" in some "main" component "CMakeLists.txt"
Also removed repeated configuraiton options in legacy_i2c_driver/sdkconfig.ci.defaults
as they are already specified in legacy_i2c_driver/sdkconfig.defaults
ESP_CACHE_MSYNC_FLAG_DIR_C2M: From cache to memory
ESP_CACHE_MSYNC_FLAG_DIR_M2C: From memory to cache
By default, if no direction flag is set, it will fallback C2M direction.
For M2C direction, now this API will do an invalidation.
