Fix #8544: Parse the correct schema version from manifest

[aranke]

resolves #8544
docs dbt-labs/docs.getdbt.com/#

Problem

Solution

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/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

[github-actions]

Thank you for your pull request! We could not find a changelog entry for this change. For details on how to document a change, see the contributing guide.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.01% 🎉

Comparison is base (9aff3ca) 86.39% compared to head (b8d3367) 86.41%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8551      +/-   ##
==========================================
+ Coverage   86.39%   86.41%   +0.01%     
==========================================
  Files         174      174              
  Lines       25587    25587              
==========================================
+ Hits        22106    22111       +5     
+ Misses       3481     3476       -5     

Flag	Coverage Δ
integration	83.22% <100.00%> (+0.01%)	⬆️
unit	65.04% <0.00%> (ø)

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

Files Changed	Coverage Δ
core/dbt/contracts/graph/manifest.py	93.84% <100.00%> (ø)

... and 6 files with indirect coverage changes

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[github-actions]

The backport to 1.6.latest failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-1.6.latest 1.6.latest
# Navigate to the new working tree
cd .worktrees/backport-1.6.latest
# Create a new branch
git switch --create backport-8551-to-1.6.latest
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 d66fe214d9ed42743f7d05c66195c8dd5db3a7d2
# Push it to GitHub
git push --set-upstream origin backport-8551-to-1.6.latest
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-1.6.latest

Then, create a pull request where the base branch is 1.6.latest and the compare/head branch is backport-8551-to-1.6.latest.