Protocol 22 Soroban RPC changes

[overcat]

Closes #983

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.66%. Comparing base (4330542) to head (fda91cd).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #984   +/-   ##
=======================================
  Coverage   98.65%   98.66%           
=======================================
  Files         253      253           
  Lines       13333    13373   +40     
=======================================
+ Hits        13154    13194   +40     
  Misses        179      179           

Flag	Coverage Δ
unittests	98.66% <100.00%> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
stellar_sdk/soroban_rpc.py	100.00% <100.00%> (ø)
stellar_sdk/soroban_server.py	94.28% <100.00%> (+0.16%)	⬆️
stellar_sdk/soroban_server_async.py	97.14% <100.00%> (+0.08%)	⬆️
tests/test_soroban_server_async.py	100.00% <100.00%> (ø)
tests/test_soroban_server_sync.py	100.00% <100.00%> (ø)