Print error details when an IssuanceError is thrown (#9804)

When a CA fails to issue a certificate after finalisation Certbot
currently prints the following unhelpful message:

```
An unexpected error occurred:
acme.errors.IssuanceError
```

This PR makes Certbot print the ACME error object from the order, as
such

```
An unexpected error occurred:
CAA error :: Invalid CAA: CAA prohibits issuance
```

## Pull Request Checklist

- [ ] The Certbot team has recently expressed interest in reviewing a PR
for this. If not, this PR may be closed due our limited resources and
need to prioritize how we spend them.
- [x] If the change being made is to a [distributed
component](https://certbot.eff.org/docs/contributing.html#code-components-and-layout),
edit the `master` section of `certbot/CHANGELOG.md` to include a
description of the change being made.
- [x] Add or update any documentation as needed to support the changes
in this PR.
- [x] Include your name in `AUTHORS.md` if you like.

certbot/CHANGELOG.md

@@ -14,7 +14,7 @@ Certbot adheres to [Semantic Versioning](https://semver.org/).
 
 ### Fixed
 
-*
+* Fixed a bug where issuance error details where not printed
 
 More details about these changes can be found on our GitHub repo.
 

certbot/src/certbot/_internal/log.py

@@ -373,8 +373,9 @@ def post_arg_parse_except_hook(exc_type: Type[BaseException], exc_value: BaseExc
             logger.error(str(exc_value))
             exit_func()
         logger.error('An unexpected error occurred:')
-        if messages.is_acme_error(exc_value):
+        acme_error = getattr(exc_value, "error", exc_value)
-            logger.error(display_util.describe_acme_error(cast(messages.Error, exc_value)))
+        if messages.is_acme_error(acme_error):
+            logger.error(display_util.describe_acme_error(cast(messages.Error, acme_error)))
         else:
             output = traceback.format_exception_only(exc_type, exc_value)
             # format_exception_only returns a list of strings each