[mono][arm64] Fix SeqPointInfo allocation (#118542)

`bp_addrs` now needs to contain a pointer slot for every single byte in the code.

Regressed after #118458

Fixes #118519

Author: BrzVlad

src/mono/mono/mini/mini-arm64.c

@@ -6966,7 +6966,7 @@ mono_arch_get_seq_point_info (guint8 *code)
 		ji = mini_jit_info_table_find (code);
 		g_assert (ji);
 
-		info = g_malloc0 (sizeof (SeqPointInfo) + (ji->code_size / 4) * sizeof(guint8*));
+		info = g_malloc0 (sizeof (SeqPointInfo) + ji->code_size * sizeof(guint8*));
 
 		info->ss_tramp_addr = &ss_trampoline;