fixup! fix(@angular/build): improve library compilation diagnostics and skip redundant d.ts rebundling

Author: alan-agius4

packages/angular/build/src/builders/library/pipeline/compilation.ts

@@ -168,6 +168,13 @@ export async function compileLibrary(
 
     const hasStylesheetErrors = stylesheetErrors.length > 0;
     const emittedFiles = hasStylesheetErrors ? [] : await compilationInstance.emitAffectedFiles();
+    const diagnosePromise = runDiagnosticsAndFormat(
+      compilationInstance,
+      stylesheetErrors,
+      stylesheetWarnings,
+      colors,
+      buildState,
+    );
 
     const esmFiles = cached?.esmFiles ?? new Map<string, string>();
     const dtsFiles = cached?.dtsFiles ?? new Map<string, string>();
@@ -180,14 +187,6 @@ export async function compileLibrary(
       cached ? effectiveModifiedFiles : undefined,
     );
 
-    const diagnosePromise = runDiagnosticsAndFormat(
-      compilationInstance,
-      stylesheetErrors,
-      stylesheetWarnings,
-      colors,
-      buildState,
-    );
-
     return {
       esmFiles,
       dtsFiles,