Auth Web: should use CorpTypeCd enum instead of local duplicate

In auth-web/src/util/constants.ts is an enum that is basically a duplicate of https://github.com/bcgov/bcrs-shared-components/blob/main/src/modules/corp-type-module/corp-type-module.ts.

This ticket is to replace the local enum with the shared one.

Start with auth-web/src/util/constants.ts and compare its local enum with CorpTypeCd in the linked bcrs-shared-components corp-type-module.ts. Replace the duplicate with the shared enum, then verify that the auth-web references still resolve and use the shared values.

Written by the indexing model from the issue text.