[CT-3327] [Feature] remove `version` and `config-version` from the starter project in dbt-core

### Is this your first time submitting a feature request?

- [X] I have read the [expectations for open source contributors](https://docs.getdbt.com/docs/contributing/oss-expectations)
- [X] I have searched the existing issues, and I could not find an existing issue for this feature
- [X] I am requesting a straightforward extension of existing dbt functionality, rather than a Big Idea better suited to a discussion

### Describe the feature

as of #7060 , `config-version` and `version` are optional. We should consider removing them from the starter project's `dbt_project.yml` [file](https://github.com/dbt-labs/dbt-core/blob/main/core/dbt/include/starter_project/dbt_project.yml#L6-L7) to avoid undue user confusion!

### Describe alternatives you've considered

do nothing

### Who will this benefit?

users of all kinds

### Are you interested in contributing this feature?

yes

### Anything else?

_No response_