[CORE-388] Add group metadata info to LogModelResult and LogTestResult

[aranke]

Resolves CORE-388 #10745

Description

1. We need to add group info to LogModelResult and LogTestResult for model-level notifications on node pass or fail.
   • Skipped nodes are not executed, so go through a separate LogSkipBecauseError message.
2. Add attached_node to LogTestResult event if available to get model's FQN.
3. Change Mashumaro serialization to include omit_none=True to prevent [Bug] Unable to parse dict error in logs if email property on a group is not specified #10745.
4. Create core/dbt/task/group_lookup.py to centralize group lookup logic in one place and allow it to be accessed in both tasks and runners.

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

Attention: Patch coverage is 94.73684% with 2 lines in your changes missing coverage. Please review.

Project coverage is 89.03%. Comparing base (1fd4d2e) to head (c8cfe44).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #10775   +/-   ##
=======================================
  Coverage   89.03%   89.03%           
=======================================
  Files         182      183    +1     
  Lines       23195    23215   +20     
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+ Hits        20651    20669   +18     
- Misses       2544     2546    +2     

Flag	Coverage Δ
integration	86.24% <94.73%> (+<0.01%)	⬆️
unit	62.18% <44.73%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
Unit Tests	62.18% <44.73%> (-0.02%)	⬇️
Integration Tests	86.24% <94.73%> (+<0.01%)	⬆️

[rviswanathan-dbt]

@aranke to check on skipped status for LogModelResult

[rviswanathan-dbt]

lgtm!