test(geo): add place index backend

[lawmicha]

Issue #

Description

Add place index for Geo backend stack. All integ tests are now passing

General Checklist

• Added new tests to cover change, if needed
• Build succeeds with all target using Swift Package Manager
• All unit tests pass
• All integration tests pass
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Documentation update for the change if required
• PR title conforms to conventional commit style
• New or updated tests include Given When Then inline code documentation and are named accordingly testThing_condition_expectation()
• If breaking change, documentation/changelog update with migration instructions

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.45%. Comparing base (50e001f) to head (ac2434d).
Report is 78 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #3681       +/-   ##
===========================================
- Coverage   79.01%   68.45%   -10.56%     
===========================================
  Files         288      926      +638     
  Lines       10128    31553    +21425     
===========================================
+ Hits         8003    21601    +13598     
- Misses       2125     9952     +7827     

Flag	Coverage Δ
Amplify	48.19% <ø> (?)
Auth_plugin_unit_test	79.34% <ø> (+0.32%)	⬆️
DataStore_plugin_unit_test	82.44% <ø> (?)
Geo_plugin_unit_test	73.50% <ø> (?)
Logging_plugin_unit_test	62.87% <ø> (?)
Predictions_plugin_unit_test	37.31% <ø> (?)
Storage_plugin_unit_test	76.75% <ø> (?)
unit_tests	68.45% <ø> (-10.56%)	⬇️

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