Error exit value doesn't quite match what `help return-codes` describe

### Describe the bug

According to `aws help return-codes`:

```text
* "1" -- Limited to "s3" commands, at least one or more s3 transfers
failed for the command executed.

[...]

* "253" -- The system environment or configuration was invalid. While
the command provided may be syntactically valid, missing
configuration or credentials prevented the command from running.
```

However,

```bash
$ cd ~/.aws
$ rm config credentials
$ aws configure get region
$ echo $?
1
$
```

[The same behavior occurs no matter what config key is being requested, including section-qualified names like `default.region`.]

### Expected Behavior

I would have expected **either** an exit code of 253, **or** for the builtin documentation for return-code=1 to be better (since obviously this happens for more than just S3 transfer commands).

### Current Behavior

This probably falls into "documentation bug" rather than "documentation is correct and CLI configuration parser is buggy". However, the description for doc bugs in the github issue-reporting form only mentioned User Guide and API docs, so dunno how you want to categorize this.

### Reproduction Steps

Remove the config file (and optionally point `AWS_CONFIG_FILE` at a nonexistent file, as per #7714), then run any of the `aws configure get` commands. Compare the return code with that described in the builtin help.

### Possible Solution

_No response_

### Additional Information/Context

Obviously a low-priority problem. Dunno which you consider to be authoritative ("code to the doc spec" versus "docs describe what actually exists"), but somewhere there's a mismatch. :-)

### CLI version used

aws-cli/2.17.0 Python/3.11.8 Windows/10 exe/AMD64

### Environment details (OS name and version, etc.)

Windows 10 but the builtin docs are presumably the same everywhere