Remove usage of srand() and rand() functions #714

Job	Run time
mmg-debug / ci (ubuntu-24.04, off, off, off, off, int32_t)	1h 10m 38s
mmg-debug / ci (ubuntu-24.04, off, off, on, off, int32_t)	1h 5m 37s
mmg-debug / ci (ubuntu-24.04, on, off, on, off, int32_t)	1h 21m 37s
mmg-debug / ci (ubuntu-24.04, on, off, off, off, int32_t)	1h 39m 41s
mmg-debug / ci (macos-14, on, off, off, off, int32_t)	38m 4s
mmg-debug / ci (macos-14, off, off, off, off, int32_t)	30m 43s
mmg-debug / ci (macos-14, off, off, on, off, int32_t)	23m 1s
mmg-debug / ci (ubuntu-24.04, off, on, on, off, int32_t)	1h 6m 55s
mmg-debug / ci (macos-14, off, on, on, off, int32_t)	23m 16s
mmg-debug / ci (windows-2022, on, off, off, off, int32_t)	55m 12s
mmg-debug / ci (windows-2022, off, off, off, off, int32_t)	52m 53s
mmg-debug / ci (windows-2022, off, on, off, off, int32_t)	55m 3s
mmg-debug / ci (macos-14, on, off, on, off, int32_t)	27m 49s
mmg-debug / ci (ubuntu-24.04, off, off, on, on, int64_t)	1h 45m 47s
mmg-debug / ci (ubuntu-24.04, off, off, off, on, int32_t)	41m 26s
mmg-debug / ci (ubuntu-24.04, on, on, on, on, int64_t)	43m 0s
mmg-debug / ci (windows-2022, on, on, off, off, int64_t)	4m 34s
mmg-debug / ci (ubuntu-24.04, off, off, off, off, int64_t)	2m 44s
mmg-debug / ci (macos-14, on, on, on, on, int64_t)	5m 41s
mmg-debug / ci (macos-14, off, off, off, off, int64_t)	3m 12s
mmg-debug / ci (windows-2022, off, off, off, off, int64_t)	4m 50s
mmg-debug / ci (macos-14, off, off, off, on, int32_t)	5m 5s
mmg-debug / upload_coverage	2m 15s
	15h 9m 3s

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