Revert "Option to preload extmainapps or not"

This reverts commit 33b8519202.

applications/main/gpio/application.fam

@@ -2,7 +2,6 @@ App(
     appid="gpio",
     name="GPIO",
     apptype=FlipperAppType.EXTMAINAPP,
-    preload=True,
     entry_point="gpio_app",
     cdefines=["APP_GPIO"],
     requires=["gui"],

applications/main/ibutton/application.fam

@@ -2,7 +2,6 @@ App(
     appid="ibutton",
     name="iButton",
     apptype=FlipperAppType.EXTMAINAPP,
-    preload=True,
     targets=["f7"],
     entry_point="ibutton_app",
     cdefines=["APP_IBUTTON"],

scripts/fbt/appmanifest.py

@@ -45,7 +45,6 @@ class FlipperApplication:
 
     appid: str
     apptype: FlipperAppType
-    preload: Optional[bool] = False
     name: Optional[str] = ""
     entry_point: Optional[str] = None
     flags: List[str] = field(default_factory=lambda: ["Default"])
@@ -381,7 +380,7 @@ class ApplicationsCGenerator:
     {{.app = NULL,
      .name = "{app.name}",
      .appid = "/ext/apps/.Main/{app.appid}.fap",
-     .stack_size = {1 if app.preload else 0},
+     .stack_size = 0,
      .icon = {f"&{app.icon}" if app.icon else "NULL"},
      .flags = {'|'.join(f"FlipperApplicationFlag{flag}" for flag in app.flags)}}}"""
         return f"""