Add class-leak checker. (#2973) #1821

Job	Run time
0️⃣ Kill previous runs	10s
1️⃣ PHP 8.4 - Syntax errors	55s
2️⃣ PHP 8.4 - PHPStan	1m 18s
2️⃣ PHP 8.4 - Code Style errors	1m 8s
2️⃣ PHP 8.3 - License Check	39s
2️⃣ JS front-end / Node 20	44s
2️⃣ PHP tests / 8.4 - mariadb -- Unit,Feature_v2	7m 14s
2️⃣ PHP tests / 8.4 - postgresql -- Unit,Feature_v2	5m 48s
2️⃣ PHP tests / 8.4 - sqlite -- Unit,Feature_v2	5m 42s
3️⃣ PHP dist / 8.4 - mariadb	3m 3s
3️⃣ PHP dist / 8.4 - postgresql	2m 13s
3️⃣ PHP dist / 8.4 - sqlite	8m 20s
4️⃣ Build Artifact	1m 13s
	38m 27s

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