fix: separate runtime for python IO

[ion-elgreco]

Description

Probably solves the panic with long running tasks

Related Issue(s)

• closes Runtime panic in new streaming writer: Cannot start a runtime from within a runtime #3271 (comment)

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 33 lines in your changes missing coverage. Please review.

Project coverage is 72.12%. Comparing base (19fb4a1) to head (d5b86b1).

Files with missing lines	Patch %	Lines
python/src/filesystem.rs	0.00%	20 Missing ⚠️
python/src/utils.rs	0.00%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3283      +/-   ##
==========================================
- Coverage   72.14%   72.12%   -0.03%     
==========================================
  Files         143      143              
  Lines       45668    45688      +20     
  Branches    45668    45688      +20     
==========================================
+ Hits        32949    32951       +2     
- Misses      10634    10653      +19     
+ Partials     2085     2084       -1     

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[ion-elgreco]

@rtyler i actually need to use the with_io_runtime constructs here, I have this in some commits laying around, will address that once Im back