fix(core): only check for err in handleWorkspaceChanges (#23500)

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## Current Behavior
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When there are watch event changes, and we filter them all out, we get
an empty `changedEvents` array. There were previous checks that had a
`!changedEvents.length` condition that resolved to true when the length
was 0.

## Expected Behavior
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We now check to see if `err` is set before triggering the error branch

## Related Issue(s)
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merged. -->

Fixes #23031

packages/nx/src/daemon/server/server.ts

@@ -298,7 +298,7 @@ const handleWorkspaceChanges: FileWatcherCallback = async (
       return;
     }
 
-    if (err || !changeEvents || !changeEvents.length) {
+    if (err) {
       let error = typeof err === 'string' ? new Error(err) : err;
       serverLogger.watcherLog(
         'Unexpected workspace watcher error',