Bump extensions version to 3.4.2

[Robbybp]

Fixes #1470

Also fixes #1471 by adding and using a bin_directory argument to print_extensions_version.

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 28.57143% with 5 lines in your changes missing coverage. Please review.

Project coverage is 76.36%. Comparing base (9dce004) to head (68d2566).
Report is 1 commits behind head on main.

Files	Patch %	Lines
idaes/commands/extensions.py	16.66%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1473      +/-   ##
==========================================
- Coverage   76.36%   76.36%   -0.01%     
==========================================
  Files         394      394              
  Lines       65126    65128       +2     
  Branches    14426    14427       +1     
==========================================
- Hits        49735    49732       -3     
- Misses      12829    12835       +6     
+ Partials     2562     2561       -1     

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