fix(ivy): adding projectDef instructions to all templates where <ng-content> is present (FW-745) (#27384)

Prior to this change `projectDef` instructions were placed to root templates only, thus the necessary information (selectors) in nested templates was missing. This update adds the logic to insert `projectDef` instructions to all templates where <ng-content> is present.

PR Close #27384

packages/compiler/src/render3/r3_ast.ts

@@ -83,7 +83,7 @@ export class Template implements Node {
 
 export class Content implements Node {
   constructor(
-      public selectorIndex: number, public attributes: TextAttribute[],
+      public selector: string, public attributes: TextAttribute[],
       public sourceSpan: ParseSourceSpan, public i18n?: I18nAST) {}
   visit<Result>(visitor: Visitor<Result>): Result { return visitor.visitContent(this); }
 }