Extend Eligible Nodes for ConfigSelectorMethod to include Saved Query Nodes

[trouze]

Resolves #11607

Problem

Today, our ConfigSelectorMethod supports selection from parsed and source nodes only.

As an example, you can do this dbt ls -s config.meta.contains_pii:true, but this command won't return any saved queries that have this meta key in the config, despite us using configs for other purposes (as documented).

Solution

This PR changes the nodes used by the ConfigSelectorMethod to use all_nodes method instead of configurable_nodes. It's the case that all_nodes in that method are actually configurable.

configurable_nodes method was only used in the ConfigSelectorMethod, so this change renders the method unused so we can remove it.

Checklist

• I have read the contributing guide and understand what's expected of me.
• I have run this code in development, and it appears to resolve the stated issue.
• This PR includes tests, or tests are not required or relevant for this PR.
• This PR has no interface changes (e.g., macros, CLI, logs, JSON artifacts, config files, adapter interface, etc.) or this PR has already received feedback and approval from Product or DX.
• This PR includes type annotations for new and modified functions.

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.78%. Comparing base (1efad4e) to head (06bfad4).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11635      +/-   ##
==========================================
- Coverage   88.85%   88.78%   -0.07%     
==========================================
  Files         197      197              
  Lines       24815    24813       -2     
==========================================
- Hits        22050    22031      -19     
- Misses       2765     2782      +17     

Flag	Coverage Δ
integration	85.77% <100.00%> (-0.14%)	⬇️
unit	62.87% <100.00%> (-0.01%)	⬇️

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Components	Coverage Δ
Unit Tests	62.87% <100.00%> (-0.01%)	⬇️
Integration Tests	85.77% <100.00%> (-0.14%)	⬇️

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