chore: improve error message for extra pfs columns

[frodehk]

ECALC-1342

Have you remembered and considered?

• I have added tests
• I have used conventional commits syntax (if you squash, make sure that conventional commit is used)
• I have included the Jira issue ID somewhere in the commit body (ECALC-XXXX)

Why is this pull request needed?

Error message if illegal category is used for extra power from shore columns (CABLE_LOSS and MAX_USAGE_FROM_SHORE) is the same, even if only one of them is used in the model. Can be confusing for user.

What does this pull request change?

• Improve error message to point at the problematic column (or both columns if they are in the model)
• Add and update tests

Issues related to this change:

https://equinor-ecalc.atlassian.net/browse/ECALC-1342?atlOrigin=eyJpIjoiMzljZmE4MjlkZWZjNGFmM2EwYmIxNDU4ZGQyNTdkOWUiLCJwIjoiaiJ9

[jsolaas]

It is possible to create reusable validators, they seem to be the same? We could also probably create a validator that could run separately for CABLE_LOSS and MAX_USAGE_FROM_SHORE, which would create two errors in the case where both are specified without the correct category.