Merge pull request #27097 from nextcloud/backport/27040/stable21

[stable21] Avoid reading ~/.aws/config when using S3 provider

Author: MorrisJobke

lib/private/Files/ObjectStore/S3ConnectionTrait.php

@@ -121,6 +121,7 @@ public function getConnection() {
 			'use_path_style_endpoint' => isset($this->params['use_path_style']) ? $this->params['use_path_style'] : false,
 			'signature_provider' => \Aws\or_chain([self::class, 'legacySignatureProvider'], ClientResolver::_default_signature_provider()),
 			'csm' => false,
+			'use_arn_region' => false,
 		];
 		if (isset($this->params['proxy'])) {
 			$options['request.options'] = ['proxy' => $this->params['proxy']];