Keep tenant connection string out of the audit logs

[maliming]

The tenant connection string was written to the audit logs, both as an action parameter of UpdateDefaultConnectionStringAsync and as an entity property change of TenantConnectionString.Value. DisableAuditingAttribute can now be used on method parameters.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 49.18%. Comparing base (ccd673c) to head (169e3f7).
⚠️ Report is 10 commits behind head on rel-10.7.

Additional details and impacted files

@@             Coverage Diff              @@
##           rel-10.7   #26048      +/-   ##
============================================
- Coverage     49.20%   49.18%   -0.03%     
============================================
  Files          3806     3806              
  Lines        132482   132496      +14     
  Branches      10043    10045       +2     
============================================
- Hits          65194    65169      -25     
- Misses        65328    65380      +52     
+ Partials       1960     1947      -13     

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