fix(wrangler): Show feedback on Pages Function upload failure (#5819)

* fix(wrangler): Show feedback on Pages project deployment failure

Today, if uploading a Pages Function, or deploying a Pages
project fails for whatever reason, there’s no feedback shown
to the user. Worse yet, the shown message is misleading,
saying the deployment was successful, when in fact it was not:

```
✨ Deployment complete!
```

This commit ensures that we provide users with:

- the correct feedback with respect to their Pages deployment
- the appropriate messaging depending on the status of their
project's deployment status
- the appropriate logs in case of a deployment failure

* PR review feedback

* fix tests

* add tests

* refactor tests

* PR review fixes 2

---------

Co-authored-by: Carmen Popoviciu <cpopoviciu@cloudflare.com>

.changeset/nice-waves-sing.md

@@ -0,0 +1,17 @@
+---
+"wrangler": minor
+---
+
+fix: Show feedback on Pages project deployment failure
+
+Today, if uploading a Pages Function, or deploying a Pages project fails for whatever reason, there’s no feedback shown to the user. Worse yet, the shown message is misleading, saying the deployment was successful, when in fact it was not:
+
+```
+✨ Deployment complete!
+```
+
+This commit ensures that we provide users with:
+
+- the correct feedback with respect to their Pages deployment
+- the appropriate messaging depending on the status of their project's deployment status
+- the appropriate logs in case of a deployment failure