feat(build): Log whether type checking is actually performed (vercel#24440)

Closes vercel#24889

## Feature

Currently `next build` is logging "Checking validity of types" even if `typescript.ignoreBuildErrors` is `true`. It seems like these options still work so `next build` either shouldn't log anything related to type-checking or log that type-checking is skipped.

I decided to branch the log message for clarity.

Happy to add a test but I'm not sure if you have existing infra considering https://github.com/vercel/next.js/pull/23226/files (which added the message) didn't add or change tests either.

CI failures look unrelated to me.

Author: eps1lon

packages/next/build/index.ts

@@ -183,7 +183,11 @@ export default async function build(
     const ignoreTypeScriptErrors = Boolean(config.typescript?.ignoreBuildErrors)
     const typeCheckStart = process.hrtime()
     const typeCheckingSpinner = createSpinner({
-      prefixText: `${Log.prefixes.info} Checking validity of types`,
+      prefixText: `${Log.prefixes.info} ${
+        ignoreTypeScriptErrors
+          ? 'Skipping validation of types'
+          : 'Checking validity of types'
+      }`,
     })
 
     const verifyResult = await nextBuildSpan
@@ -194,15 +198,17 @@ export default async function build(
 
     const typeCheckEnd = process.hrtime(typeCheckStart)
 
-    telemetry.record(
-      eventTypeCheckCompleted({
-        durationInSeconds: typeCheckEnd[0],
-        typescriptVersion: verifyResult.version,
-        inputFilesCount: verifyResult.result?.inputFilesCount,
-        totalFilesCount: verifyResult.result?.totalFilesCount,
-        incremental: verifyResult.result?.incremental,
-      })
-    )
+    if (!ignoreTypeScriptErrors) {
+      telemetry.record(
+        eventTypeCheckCompleted({
+          durationInSeconds: typeCheckEnd[0],
+          typescriptVersion: verifyResult.version,
+          inputFilesCount: verifyResult.result?.inputFilesCount,
+          totalFilesCount: verifyResult.result?.totalFilesCount,
+          incremental: verifyResult.result?.incremental,
+        })
+      )
+    }
 
     if (typeCheckingSpinner) {
       typeCheckingSpinner.stopAndPersist()