Added decoder for NSKeyedArchiver encoded plists

[codecov[bot]]

Codecov Report

Attention: 116 lines in your changes are missing coverage. Please review.

Comparison is base (92574f3) 86.07% compared to head (7536198) 85.85%.

Files	Patch %	Lines
plaso/parsers/plist_plugins/interface.py	49.56%	116 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #4804 +/- ## ========================================== - Coverage 86.07% 85.85% -0.23% ========================================== Files 419 419 Lines 37765 37995 +230 ========================================== + Hits 32506 32620 +114 - Misses 5259 5375 +116 ```

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