fix(rust): Incorrect atomic ordering in Connector

[orlp]

I don't know how I made these silly mistakes, in my mind I associated "Acquire" with receiving and "Release" with sending, but in fact both sender and receiver must both acquire and send to properly synchronize.

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 79.85%. Comparing base (4e286d8) to head (6c59d44).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...es/polars-stream/src/async_primitives/connector.rs	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #21341      +/-   ##
==========================================
- Coverage   79.92%   79.85%   -0.08%     
==========================================
  Files        1596     1596              
  Lines      228745   228746       +1     
  Branches     2616     2616              
==========================================
- Hits       182825   182658     -167     
- Misses      45321    45489     +168     
  Partials      599      599              

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