REST: Allow Identifier type in drop_view method (#3408)

# Rationale for this change

Fix the warning message in the IDE. 

The base class and other classes use the `str | Identifier` style in the
`drop_view` method.
I also confirmed that other methods in the REST catalog class use `str |
Identifier` for identifiers.

## Are these changes tested?

N/A

## Are there any user-facing changes?

No

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Author: ebyhr

pyiceberg/catalog/rest/__init__.py

@@ -1461,7 +1461,7 @@ def register_view(self, identifier: str | Identifier, metadata_location: str) ->
 
     @retry(**_RETRY_ARGS)
     @override
-    def drop_view(self, identifier: str) -> None:
+    def drop_view(self, identifier: str | Identifier) -> None:
         self._check_endpoint(Capability.V1_DELETE_VIEW)
         response = self._session.delete(
             self.url(Endpoints.drop_view, prefixed=True, **self._split_identifier_for_path(identifier, IdentifierKind.VIEW)),