feat(depinject): allow module keys to manually be created for codegen/manual wiring

[aaronc]

Description

Ref #12556

This PR adds depinject.ModuleKeyContext which allows ModuleKeys to be constructed manually for use in codegen or manual wiring scenarios without depinject.

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Author Checklist

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I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

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I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[codecov]

Codecov Report

Merging #13124 (41d7a2f) into main (ccdc355) will increase coverage by 0.94%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main   #13124      +/-   ##
==========================================
+ Coverage   53.21%   54.15%   +0.94%     
==========================================
  Files         645      666      +21     
  Lines       55193    56755    +1562     
==========================================
+ Hits        29370    30736    +1366     
- Misses      23476    23616     +140     
- Partials     2347     2403      +56     

Impacted Files	Coverage Δ
depinject/config.go	89.41% <100.00%> (ø)
depinject/container.go	90.40% <100.00%> (ø)
depinject/module_key.go	100.00% <100.00%> (ø)
depinject/one_per_module.go	78.84% <0.00%> (ø)
depinject/internal/codegen/func.go	100.00% <0.00%> (ø)
depinject/module_dep.go	92.30% <0.00%> (ø)
depinject/group.go	80.00% <0.00%> (ø)
depinject/simple.go	100.00% <0.00%> (ø)
depinject/internal/codegen/type.go	73.63% <0.00%> (ø)
depinject/internal/codegen/file.go	92.59% <0.00%> (ø)
... and 16 more