CI - disable cirq-rigetti tests

[pavoljuhas]

• Remove cirq-rigetti tests from ci-daily.yml
• Remove cirq-rigetti tests from ci.yml
• Hardcode exclusion of cirq_rigetti in cirq-core unit tests
• Drop cirq-rigetti requirements from dev.env.txt
• Exclude cirq-rigetti from typecheck

Partially implements #7297

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.67%. Comparing base (b1ff3ae) to head (9f7f4a3).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7433      +/-   ##
==========================================
- Coverage   98.69%   98.67%   -0.03%     
==========================================
  Files        1112     1085      -27     
  Lines       97993    96094    -1899     
==========================================
- Hits        96714    94819    -1895     
+ Misses       1279     1275       -4     

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[pavoljuhas]

ci-daily and ci-weekly workflows passed at df49f7d.
OK to revert c98734d.

[mhucka]

LGTM. Thanks for doing this!

[pavoljuhas]

NTS and Others: let us put this on hold until after #7436 is merged and used in docs build.