refactor(packagist): Remove deprecated URL API (#20547)

lib/modules/datasource/packagist/index.ts

-import URL from 'url';
 import { logger } from '../../../logger';
 import { ExternalHostError } from '../../../types/errors/external-host-error';
 import { cache } from '../../../util/cache/package/decorator';
 import * as hostRules from '../../../util/host-rules';
 import type { HttpOptions } from '../../../util/http/types';
 import * as p from '../../../util/promises';
-import { ensureTrailingSlash, joinUrlParts } from '../../../util/url';
+import { joinUrlParts, resolveBaseUrl } from '../../../util/url';
 import * as composerVersioning from '../../versioning/composer';
 import { Datasource } from '../datasource';
 import type { GetReleasesConfig, ReleaseResult } from '../types';
@@ -42,7 +41,7 @@ export class PackagistDatasource extends Datasource {
   }
 
   private async getRegistryMeta(regUrl: string): Promise<RegistryMeta | null> {
-    const url = URL.resolve(ensureTrailingSlash(regUrl), 'packages.json');
+    const url = resolveBaseUrl(regUrl, 'packages.json');
     const opts = PackagistDatasource.getHostOpts(url);
     const res = (await this.http.getJson<PackageMeta>(url, opts)).body;
     const meta: RegistryMeta = {
@@ -225,14 +224,14 @@ export class PackagistDatasource extends Datasource {
       }
       let pkgUrl: string;
       if (packageName in providerPackages) {
-        pkgUrl = URL.resolve(
+        pkgUrl = resolveBaseUrl(
           registryUrl,
           providersUrl!
             .replace('%package%', packageName)
             .replace('%hash%', providerPackages[packageName])
         );
       } else if (providersLazyUrl) {
-        pkgUrl = URL.resolve(
+        pkgUrl = resolveBaseUrl(
           registryUrl,
           providersLazyUrl.replace('%package%', packageName)
         );