Different behavior depending on Go version

[bauersimon]

Changing the go.mod file to:

module github.com/symflower/eval-dev-quality

// go 1.21.5
go 1.22

toolchain go1.22.7

and running

go test github.com/symflower/eval-dev-quality/evaluate/task -run TestTaskWriteTestsRun/Symflower_Fix/Go/Model_generated_test_with_unused_import

fails... which could lead to confusion for users.

• [ ] Figure out what exactly the problem is here. It would be bad if the benchmark score is affected (which seems to be the case).
• [ ] Specify in the README which Go versions are supported and should be used.