Incorporate alternate monitoring location identifier in to TADA_FindNearbySites

[hillarymarler]

When alternate monitoring location identifiers are served by WQX 3.0 profiles, incorporate it into TADA_FindNearbySites to group monitoring locations already identified as groups by submitting orgs.

Reminders for TADA contributors addressing this issue:

New features and/or edits should include all the following work:

• Create or edit the function/code.

• Document all code using line/inline and/or multi-line/block comments
  to describe what is does.

• Create or edit tests in tests/testthat folder to help prevent and/or
  troubleshoot potential future issues.

• Create or edit the function documentation. Include working
  examples.

• Update or add the new functionality to the appropriate vignette
  (or create new one).

• If function/code edits made as part of this issue impact other
  functions in the package or functionality in the shiny app, ensure
  those are updated as well.

• Run TADA_UpdateAllRefs(), TADA_UpdateExampleData(), styler::style_pkg(),
  devtools::document(), and devtools::check() and address any new notes or
  issues before creating a pull request.

• Run more robust check for releases: devtools::check(manual = TRUE,
  remote = TRUE, incoming = TRUE)