Fix ogmios v6 backend / plutusv3

[nielstron]

Attempts to resolve #381 as proposed by @nullhashpixel

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 85.30%. Comparing base (3ca745a) to head (4a6b697).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pycardano/backend/ogmios_v6.py	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #383      +/-   ##
==========================================
+ Coverage   85.23%   85.30%   +0.07%     
==========================================
  Files          32       32              
  Lines        4213     4213              
  Branches     1060     1060              
==========================================
+ Hits         3591     3594       +3     
+ Misses        435      434       -1     
+ Partials      187      185       -2     

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[cffls]

Seems like the integration test has failed with errors like this:

FAILED test/test_plutus.py::TestPlutus::test_plutus_v2_inline_script_inline_datum - AttributeError: 'dict' object has no attribute 'language'

[nielstron]

It seems that the script object is a dict and not (like the typing suggests) a Script object @wrmarchetto