fix(cli): the LoadBalancerProvider doesn't match LBs when querying by a subset of tags

[otaviomacedo]

There was a regression in the load balancer lookup, in which we started requiring that the set of tags in the query is strictly the same as the set of tags in the load balancer (rather than merely a subset of it).

Remove the length equality constraint and also simplify the code to make the intent clearer.

Fixes #32161.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.18%. Comparing base (089e9d8) to head (1576dd3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #32164      +/-   ##
==========================================
- Coverage   77.19%   77.18%   -0.01%     
==========================================
  Files         105      105              
  Lines        7164     7163       -1     
  Branches     1311     1311              
==========================================
- Hits         5530     5529       -1     
  Misses       1454     1454              
  Partials      180      180              

Flag	Coverage Δ
suite.unit	77.18% <100.00%> (-0.01%)	⬇️

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Components	Coverage Δ
packages/aws-cdk	77.18% <100.00%> (-0.01%)	⬇️

✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

[mrgrain]

Build passed in CodeBuild. Not clear why status not reported back.

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[mrgrain]

@Mergifyio requeue

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AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: 1576dd3
• Result: SUCCEEDED
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