Add PHP 8.4 support to Smarty #540

Job	Run time
Tests (ubuntu-latest, 7.2, default)	1m 18s
Tests (ubuntu-latest, 7.3, default)	1m 25s
Tests (ubuntu-latest, 7.4, default)	1m 14s
Tests (ubuntu-latest, 8.0, default)	1m 19s
Tests (ubuntu-latest, 8.1, default)	1m 16s
Tests (ubuntu-latest, 8.2, default)	1m 17s
Tests (ubuntu-latest, 8.3, default)	1m 18s
Tests (windows-latest, 7.2, default)	1m 48s
Tests (windows-latest, 7.3, default)	1m 43s
Tests (windows-latest, 7.4, default)	1m 45s
Tests (windows-latest, 8.0, default)	1m 36s
Tests (windows-latest, 8.1, default)	1m 44s
Tests (windows-latest, 8.2, default)	1m 47s
Tests (windows-latest, 8.3, default)	1m 35s
Tests (ubuntu-latest, 8.0, jit)	1m 26s
Tests (ubuntu-latest, 8.1, jit)	1m 27s
Tests (ubuntu-latest, 8.2, jit)	1m 18s
Tests (ubuntu-latest, 8.3, jit)	1m 22s
	26m 38s

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