CI: reduce memory footprint for "Loadable ELF build"
CI: reduce memory footprint for "Loadable ELF build"

Build test was failing due to IRAM overflow, building with the recommended
options for reducing memory footprint should give us some breathing room.

espressif/esp-idf,espressif/esp-idf,espressif/esp-idf,espressif/esp-idf