Support HTTP Basic auth in API-key connections

Cursor's Admin API authenticates with the admin key as the HTTP
Basic auth username (empty password) and rejects Bearer tokens.
The API-key connection previously supported only Bearer and a
custom header (Anthropic's x-api-key); add a Basic-auth mode
selected by Registration.APIKeyBasicAuth, and reject providers
that set both it and APIKeyHeader.

Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>

pkg/server/api/console/v1/connector_resolvers.go

@@ -41,8 +41,9 @@ func (r *mutationResolver) CreateAPIKeyConnector(ctx context.Context, input type
 		Provider:       input.Provider,
 		Protocol:       coredata.ConnectorProtocolAPIKey,
 		Connection: &connector.APIKeyConnection{
-			APIKey: input.APIKey,
-			Header: r.providerRegistry.APIKeyHeader(input.Provider),
+			APIKey:    input.APIKey,
+			Header:    r.providerRegistry.APIKeyHeader(input.Provider),
+			BasicAuth: r.providerRegistry.APIKeyUsesBasicAuth(input.Provider),
 		},
 	}