Add registry sweep documentation to cirq_google

[dstrain115]

• Add some simple documentation on how to use registry sweeps to cirq_google's device page (currently public but not linked to from table of contents)

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.01% ⚠️

Comparison is base (d805d82) 97.88% compared to head (84f49ff) 97.88%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6291      +/-   ##
==========================================
- Coverage   97.88%   97.88%   -0.01%     
==========================================
  Files        1104     1104              
  Lines       95854    95854              
==========================================
- Hits        93831    93830       -1     
- Misses       2023     2024       +1     

Files Changed	Coverage Δ
cirq-core/cirq/ops/common_channels.py	99.74% <ø> (ø)

... and 1 file with indirect coverage changes

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[pavoljuhas]

LGTM, but we can fix a few typos in the document, please see the attached patch.
typos-in-google-devices.md.patch.txt

[dstrain115]

@pavoljuhas Is there some issue with your CLA or github registration? It's having a problem since I committed your suggestions.

[pavoljuhas]

@pavoljuhas Is there some issue with your CLA or github registration? It's having a problem since I committed your suggestions.

AFAICT, I should be all configured for the CLA check. The problem seems in commits 1a76baf, ee440ab which have Co-authored-by: ... note in the commit message. I have requested CLA override which seems to clear the check here.