Set JSDocParsingMode.ParseForTypeErrors in compiler tests (microsoft#58917)

Author: jakebailey

src/harness/fakesHosts.ts

@@ -381,6 +381,9 @@ export class CompilerHost implements ts.CompilerHost {
             }
         }
 
+        // Set ParseForTypeErrors like tsc.
+        languageVersionOrOptions = typeof languageVersionOrOptions === "object" ? languageVersionOrOptions : { languageVersion: languageVersionOrOptions };
+        languageVersionOrOptions = { ...languageVersionOrOptions, jsDocParsingMode: ts.JSDocParsingMode.ParseForTypeErrors };
         const parsed = ts.createSourceFile(fileName, content, languageVersionOrOptions, this._setParentNodes || this.shouldAssertInvariants);
         if (this.shouldAssertInvariants) {
             Utils.assertInvariants(parsed, /*parent*/ undefined);

src/harness/harnessIO.ts

@@ -222,6 +222,9 @@ export namespace Compiler {
         const shouldAssertInvariants = !lightMode;
 
         // Only set the parent nodes if we're asserting invariants.  We don't need them otherwise.
+        // Set ParseForTypeErrors like tsc.
+        languageVersionOrOptions = typeof languageVersionOrOptions === "object" ? languageVersionOrOptions : { languageVersion: languageVersionOrOptions };
+        languageVersionOrOptions = { ...languageVersionOrOptions, jsDocParsingMode: ts.JSDocParsingMode.ParseForTypeErrors };
         const result = ts.createSourceFile(fileName, sourceText, languageVersionOrOptions, /*setParentNodes:*/ shouldAssertInvariants);
 
         if (shouldAssertInvariants) {