Add new invocation context class.

[peterallenwebb]

resolves #

Description

Checklist

• I have read the contributing guide and understand what's expected of me
• I have signed the CLA
• I have run this code in development and it appears to resolve the stated issue
• I have opened an issue to add/update docs, or docs changes are not required/relevant for this PR
• I have run changie new to create a changelog entry

[github-actions]

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[codecov-commenter]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (e852e77) 51.07% compared to head (cfcb8fb) 51.26%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
dbt_common/context.py	85.71%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #52      +/-   ##
==========================================
+ Coverage   51.07%   51.26%   +0.19%     
==========================================
  Files          47       49       +2     
  Lines        2798     2846      +48     
==========================================
+ Hits         1429     1459      +30     
- Misses       1369     1387      +18     

Flag	Coverage Δ
unit	51.26% <85.71%> (+0.19%)	⬆️

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