Add integration test for source node rendering

[pankajastro]

Description

Add example DAG to run integration tests for source node rendering feature

Success Run: https://github.com/astronomer/astronomer-cosmos/actions/runs/11853052767/job/33032439737?pr=1327#step:7:449

Failed Run For Dbt < 1.5 https://github.com/astronomer/astronomer-cosmos/actions/runs/11852864026/job/33031862113?pr=1327

Related Issue(s)

closes: #1155
closes: #1229

Breaking Change?

Checklist

• I have made corresponding changes to the documentation (if required)
• I have added tests that prove my fix is effective or that my feature works

[cloudflare-workers-and-pages]

Deploying astronomer-cosmos with    Cloudflare Pages

Latest commit:	42e485d
Status:	✅  Deploy successful!
Preview URL:	https://2f437abe.astronomer-cosmos.pages.dev
Branch Preview URL:	https://source-rendering-test.astronomer-cosmos.pages.dev

View logs

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.03%. Comparing base (8ec46d2) to head (42e485d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1327      +/-   ##
==========================================
+ Coverage   95.85%   96.03%   +0.17%     
==========================================
  Files          67       67              
  Lines        3983     3983              
==========================================
+ Hits         3818     3825       +7     
+ Misses        165      158       -7     

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[tatiana]

This is great, thank you very much, @pankajastro !