fix(ivy): use any for generic context checks when !strictTemplates (#34649)

Previously, the template type-checker would always construct a generic
template context type with correct bounds, even when strictTemplates was
disabled. This meant that type-checking of expressions involving that type
was stricter than View Engine.

This commit introduces a 'strictContextGenerics' flag which behaves
similarly to other 'strictTemplates' flags, and switches the inference of
generic type parameters on the component context based on the value of this
flag.

PR Close #34649

packages/compiler-cli/test/ngtsc/template_typecheck_spec.ts

@@ -972,7 +972,8 @@ export declare class AnimationEvent {
     });
 
     it('should constrain types using type parameter bounds', () => {
-      env.tsconfig({fullTemplateTypeCheck: true, strictInputTypes: true});
+      env.tsconfig(
+          {fullTemplateTypeCheck: true, strictInputTypes: true, strictContextGenerics: true});
       env.write('test.ts', `
     import {CommonModule} from '@angular/common';
     import {Component, Input, NgModule} from '@angular/core';