Cleanup

[mo-hosni]

Removed a lot of obsolete/unused files after the latest updates for caravel and caravan.

[mo-hosni]

I ran make ship and make truck and there are no issues with either.
I also ran make caravel_core and make caravan_core in openlane and there is no issue.

[algofoogle]

This is huge (not working well in GitHub UI) so probably needs an offline review again. @marwaneltoukhy what do you think? Can you check it? If it's all deletes, maybe it's fine to go as-is. Note that Caravel has changed since this PR.

[mo-hosni]

@algofoogle Yes, it is huge. But,you can check the individual commits in the PR in the UI and it will show the exact files that has been deleted, the commits are not too many.

[d-m-bailey]

@mo-hosni Thanks for deleting the unused files.

What about keeping the openlane/* files. I know they are not used currently, but it might be a good reference for someone that wanted to implement the functionality as a hard macro.
Besides that, I think we can delete the other files.