feat(dart): use first version of constraint for dependencies using SDK version

[DmitriyLewen]

Description

Use first version of constraint for dependencies using SDK version. e.g. in this case the version of flutter_test should be 3.3.0:

  flutter_test:
    dependency: "direct dev"
    description: flutter
    source: sdk
    version: "0.0.0"
sdks:
  dart: ">=2.18.0 <3.0.0"
  flutter: "^3.3.0"

More information in #5984

Related issues

• Close #6017

Checklist

• [x] I've read the guidelines for contributing to this repository.
• [x] I've followed the conventions in the PR title.
• [x] I've added tests that prove my fix is effective or that my feature works.
• [x] I've updated the documentation with the relevant information (if needed).
• [ ] I've added usage information (if the PR introduces new options)
• [x] I've included a "before" and "after" example to the description (if the PR is a user interface change).

[github-actions[bot]]

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