fix(cmake) require 'main' for Micropython (#2444)

Commit f2c2393b30 (#2420) breaks lv_micropython esp32 port. Apparently main dependency is require for LVGL when building Micropython, otherwise GC related code breaks

This commit adds 'main' dependency to LVGL conditionally only if building inside lv_micropython.

CMakeLists.txt

@@ -2,8 +2,16 @@ if(ESP_PLATFORM)
 
 file(GLOB_RECURSE SOURCES src/*.c)
 
-idf_component_register(SRCS ${SOURCES}
-                       INCLUDE_DIRS . src ../)
+idf_build_get_property(LV_MICROPYTHON LV_MICROPYTHON)
+
+if (LV_MICROPYTHON)
+    idf_component_register(SRCS ${SOURCES}
+                           INCLUDE_DIRS . src ../
+                           REQUIRES main)
+else()
+    idf_component_register(SRCS ${SOURCES}
+                           INCLUDE_DIRS . src ../)
+endif()
 
 target_compile_definitions(${COMPONENT_LIB} PUBLIC "-DLV_CONF_INCLUDE_SIMPLE")