feat(core) Simplify authentication type (#3578)

* ⚡ Add generic auth type

* ⚡ Remove queryAuth

* ⚡ Remove bearer

* ⚡ Remove headerAuth

* ⚡ Remove basicAuth

* ⚡ Adjust tests

* ⚡ Small improvements

* 👕 Fix lint issue

packages/nodes-base/credentials/HttpHeaderAuth.credentials.ts

@@ -1,5 +1,5 @@
 import {
-	IAuthenticateHeaderAuth,
+	IAuthenticateGeneric,
 	ICredentialType,
 	INodeProperties,
 } from 'n8n-workflow';
@@ -26,11 +26,13 @@ export class HttpHeaderAuth implements ICredentialType {
 			default: '',
 		},
 	];
-	authenticate = {
-		type: 'headerAuth',
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
 		properties: {
-			name: '={{credentials.name}}',
-			value: '={{credentials.value}}',
+			headers: {
+				'={{$credentials.name}}': '={{$credentials.value}}',
+			},
 		},
-	} as IAuthenticateHeaderAuth;
+	};
 }