[BUG][typescript-angular] apiKeys cause service compilation errors

Updated TypeScript Angular `configuration.mustache` to properly handle
apiKeys in query parameters by using `OpenApiHttpParams` instead of
`HttpHeaders` to avoid compilation errors.

Fixes #22774

Author: saxicek

modules/openapi-generator/src/main/resources/typescript-angular/configuration.mustache

@@ -1,5 +1,6 @@
-import { HttpHeaders, HttpParams, HttpParameterCodec } from '@angular/common/http';
+import { HttpHeaders, HttpParameterCodec } from '@angular/common/http';
 import { Param } from './param';
+import { OpenApiHttpParams } from './query.params';
 
 export interface {{configurationParametersInterfaceName}} {
     /**
@@ -198,7 +199,7 @@ constructor({ accessToken, apiKeys, basePath, credentials, encodeParam, encoder,
             : headers;
     }
 
-    public addCredentialToQuery(credentialKey: string, paramName: string, query: HttpParams): HttpParams {
+    public addCredentialToQuery(credentialKey: string, paramName: string, query: OpenApiHttpParams): OpenApiHttpParams {
         const value = this.lookupCredential(credentialKey);
         return value
             ? query.set(paramName, value)