WIP: Investigate issue in the intersection of "+tag:some_tag" select statements

[tatiana]

A user reported that they see the correct DbtDag when using Cosmos 1.8.1 with:

• LoadMode.DBT_LS
• RenderConfig(selector="accounts_marts")

Where the selector accounts_marts is defined as:

    - name: accounts_marts
      description: Run Accounts models
      definition:
        intersection:
          - '+tag:accounts'
          - '+tag:datamart'
          - '+tag:stratus'

The expected behaviour includes:

• 164 Airflow tasks
• 152 Local run tasks
• 12 Snapshot tasks

However, when they attempt to run the same DbtDag using:

• LoadMode.DBT_MANIFEST
• RenderConfig(select=["+tag:accounts,+tag:datamart,+tag:stratus"])

Their DbtDag seems to have the wrong subset of nodes.

They reported:

• 197 Airflow tasks
• 183 Local run tasks
• 14 Snapshot tasks

This pull request aims to reproduce and fix this issue.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.94%. Comparing base (768a0b9) to head (4b693a6).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1466   +/-   ##
=======================================
  Coverage   96.94%   96.94%           
=======================================
  Files          73       73           
  Lines        4355     4355           
=======================================
  Hits         4222     4222           
  Misses        133      133           

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