refactor: prevent using `empty()` on `CURLRequest` #12563

Job	Run time
Setup PHP Version for Code Coverage	1s
Others (8.2) / Sanity Tests	3m 34s
Others (8.1) / Sanity Tests	2m 30s
Others (8.3) / Sanity Tests	2m 19s
SeparateProcess (8.1) / tests	3m 39s
CacheLive (8.1) / Cache Live Tests	1m 56s
CacheLive (8.2) / Cache Live Tests	2m 19s
CacheLive (8.3) / Cache Live Tests	2m 4s
SeparateProcess (8.2) / tests	3m 20s
DatabaseLive (8.1, MySQLi, 5.7) / tests	2m 58s
DatabaseLive (8.1, MySQLi, 8.0) / tests	3m 58s
DatabaseLive (8.1, OCI8, 8.0) / tests	5m 58s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 44s
SeparateProcess (8.3) / tests	3m 26s
DatabaseLive (8.1, SQLite3, 8.0) / tests	2m 54s
DatabaseLive (8.2, MySQLi, 8.0) / tests	4m 35s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	4m 22s
DatabaseLive (8.2, OCI8, 8.0) / tests	6m 33s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 9s
DatabaseLive (8.2, SQLite3, 8.0) / tests	2m 57s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	4m 49s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 14s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 2s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 28s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 39s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	4m 8s
Upload coverage results to Coveralls / coveralls	32s
	1h 30m 8s

Provide feedback