[FEATURE] Ability to download the full log file

## Feature Summary

It should be possible to download the full log for a pod from the workloads -> pods screen.

## Motivation

In headlamp there was a feature to download the log from the log viewer screen. It was also possible to view “all” log lines. Both of these features have been removed in AKS desktop - presumably to prevent the UI from locking up. But the was genuinely one of the most important features for me as it saved me from dealing with the kubectl tool.

## Detailed Description

On the log viewer screen add a button to download the log file (optionally with a size limit).

## Alternatives Considered

* go back to headlamp
* use kubectl

## Use Cases

1. When diagnosing issues I need the ability to quickly search the log with a text editor to find patterns and errors.

## Implementation Ideas

The capability already exists it has just been removed from the UI.

## Additional Context

N/A

## Acceptance Criteria

- [ ] There is a way to download the full log for a pod

## Checklist

- [x] I have searched for existing feature requests
- [x] I have provided clear use cases
- [x] I have considered alternatives
- [x] This feature aligns with the project's goals