[misc] Add fallback check for simple_password_check plugin in password validation detection

Author: rusher

test/integration/auth-plugin.test.js

@@ -652,6 +652,14 @@ describe.concurrent('authentication plugin', () => {
     } catch (e) {
       strictPasswordValidation = false;
     }
+    if (!strictPasswordValidation) {
+      try {
+        const res = await shareConn.query("SELECT * FROM information_schema.PLUGINS WHERE PLUGIN_NAME = 'simple_password_check' AND PLUGIN_STATUS = 'ACTIVE'");
+        if (res.length > 0) strictPasswordValidation = true;
+      } catch (e) {
+        // ignore
+      }
+    }
 
     await shareConn.query('drop user verifParsec' + getHostSuffix()).catch(() => {});
     await shareConn.query(