refactor(compiler-cli): broaden type of getPotentialImportsFor (angular#58627)

Currently the `getPotentialImportsFor` only accepts a `ClassDeclaration` as the context for generating an import, but that's not necessary because it doesn't require any class-specific information. These changes expand it to any `Node` so that it can be used when generating imports in testing declarations.

PR Close angular#58627

Author: crisbeto

packages/compiler-cli/src/ngtsc/typecheck/api/checker.ts

@@ -169,7 +169,7 @@ export interface TemplateTypeChecker {
    */
   getPotentialImportsFor(
     toImport: Reference<ClassDeclaration>,
-    inComponent: ts.ClassDeclaration,
+    inContext: ts.Node,
     importMode: PotentialImportMode,
   ): ReadonlyArray<PotentialImport>;
 

packages/compiler-cli/src/ngtsc/typecheck/src/checker.ts

@@ -846,7 +846,7 @@ export class TemplateTypeCheckerImpl implements TemplateTypeChecker {
   private emit(
     kind: PotentialImportKind,
     refTo: Reference<ClassDeclaration>,
-    inContext: ts.ClassDeclaration,
+    inContext: ts.Node,
   ): PotentialImport | null {
     const emittedRef = this.refEmitter.emit(refTo, inContext.getSourceFile());
     if (emittedRef.kind === ReferenceEmitKind.Failed) {
@@ -889,7 +889,7 @@ export class TemplateTypeCheckerImpl implements TemplateTypeChecker {
 
   getPotentialImportsFor(
     toImport: Reference<ClassDeclaration>,
-    inContext: ts.ClassDeclaration,
+    inContext: ts.Node,
     importMode: PotentialImportMode,
   ): ReadonlyArray<PotentialImport> {
     const imports: PotentialImport[] = [];