Check consultopo loaded >=1 credentials w/-consul_auth_static_file

[timvaillancourt]

Description

This PR confirms consultopo loaded >= 1 credential(s) when using -consul_auth_static_file

This is to address no validation errors when a valid-but-empty JSON config is provided, ie: {}

Related Issue(s)

Related to: #18150

Checklist

• "Backport to:" labels have been added if this change should be back-ported to release branches
• If this change is to be back-ported to previous releases, a justification is included in the PR description
• Tests were added or are not required
• Did the new or modified tests pass consistently locally and on CI?
• Documentation was added or is not required

Deployment Notes

[vitess-bot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.48%. Comparing base (fcfa0c8) to head (f9ebdbb).
Report is 17 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #18152   +/-   ##
=======================================
  Coverage   67.48%   67.48%           
=======================================
  Files        1603     1603           
  Lines      262337   262388   +51     
=======================================
+ Hits       177034   177081   +47     
- Misses      85303    85307    +4     

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[GuptaManan100]

Looks good to me!

[github-actions]

This PR is being marked as stale because it has been open for 30 days with no activity. To rectify, you may do any of the following:

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If no action is taken within 7 days, this PR will be closed.