feat(forms): template & reactive support for FVC

Implement support for `FormUiComponent`s in both Reactive and Template-driven
forms. This allows components that use the new signal-based form control
architecture to be used seamlessly within existing Angular form paradigms.

Key changes:
- Integrated `ɵngControlCreate` and `ɵngControlUpdate` lifecycle hooks into
  `NgModel`, `FormControlDirective`, and `FormControlName`.
- Implemented branching logic to choose between the traditional `ControlValueAccessor` (CVA) path and the new FVC path based on the host element's capabilities.
- Added comprehensive unit tests for FVC integration in both Reactive (`reactive_fvc.spec.ts`) and Template-driven (`template_fvc.spec.ts`) forms, covering:
    - Value synchronization (model -> view and view -> model).
    - Status synchronization (touched, dirty, valid, invalid, pending, required).
    - Error propagation and `parseErrors` support.
    - Fallback behavior to native DOM properties (disabled, required) when FVC inputs are missing.
    - Graceful fallback to CVA when no FVC pattern is detected.
- Refined `NgModel` to correctly handle `required` validation via its existing `RequiredValidator` directive while supporting FVC for other properties.

packages/compiler-cli/test/compliance/test_cases/r3_view_compiler_listener/nested_two_way_template.js

@@ -9,8 +9,10 @@ function TestCmp_ng_template_1_Template(rf, ctx) {
       return $r3$.ɵɵresetView($event);
     });
     $r3$.ɵɵelementEnd();
+    $r3$.ɵɵcontrolCreate();
   } if (rf & 2) {
     const $ctx_r0$ = $r3$.ɵɵnextContext();
     $r3$.ɵɵtwoWayProperty("ngModel", $ctx_r0$.name);
+    $r3$.ɵɵcontrol();
   }
 }

packages/compiler-cli/test/compliance/test_cases/r3_view_compiler_listener/simple_two_way_template.js

@@ -7,8 +7,10 @@ function TestCmp_Template(rf, ctx) {
       return $event;
     });
     $r3$.ɵɵelementEnd();
+    $r3$.ɵɵcontrolCreate();
   } if (rf & 2) {
     $r3$.ɵɵadvance();
     $r3$.ɵɵtwoWayProperty("ngModel", ctx.name);
+    $r3$.ɵɵcontrol();
   }
 }

packages/compiler-cli/test/compliance/test_cases/r3_view_compiler_listener/two_way_binding_to_signal_loop_variable_template.js

@@ -8,10 +8,12 @@ function TestCmp_For_1_Template(rf, ctx) {
       return $r3$.ɵɵresetView($event);
     });
     $r3$.ɵɵelementEnd();
+    $r3$.ɵɵcontrolCreate();
   }
   if (rf & 2) {
     const $name_r2$ = ctx.$implicit;
     $r3$.ɵɵtwoWayProperty("ngModel", $name_r2$);
+    $r3$.ɵɵcontrol();
   }
 }
 

packages/compiler-cli/test/compliance/test_cases/r3_view_compiler_listener/two_way_to_any_template.js

@@ -6,8 +6,10 @@ function TestCmp_Template(rf, ctx) {
       return $event;
     });
     $r3$.ɵɵelementEnd();
+    $r3$.ɵɵcontrolCreate();
   }
   if (rf & 2) {
     $r3$.ɵɵtwoWayProperty("ngModel", ctx.value);
+    $r3$.ɵɵcontrol();
   }
 }