fix: Re-use pre-existing browser context in PlaywrightBrowserController

[Pijukatel]

Description

• PlaywrightBrowserController can receive a browser with already active contexts. If that is the case, use the first active context directly in the PlaywrightBrowserController instead of creating a new context

Issues

• Closes: How to config user_data_dir when combine crawlee playwright camoufox #1776

Testing

• Added unit test
• Manual test on snippet reported by the user

Checklist

• CI passed

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.20%. Comparing base (944753a) to head (2ce9364).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1778      +/-   ##
==========================================
- Coverage   92.25%   92.20%   -0.05%     
==========================================
  Files         156      156              
  Lines       10654    10654              
==========================================
- Hits         9829     9824       -5     
- Misses        825      830       +5     

Flag	Coverage Δ
unit	92.20% <100.00%> (-0.05%)	⬇️

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[Mantisus]

LGTM.

This should be taken into consideration when working on #1744

[vdusek]

LGTM