Feature/required vertices preservation #605

Job	Run time
mmg-debug / ci (ubuntu-20.04, on, off, on, off, int32_t)	1h 18m 3s
mmg-debug / ci (ubuntu-20.04, on, off, off, off, int32_t)	1h 36m 44s
mmg-debug / ci (ubuntu-20.04, off, off, on, off, int32_t)	1h 4m 16s
mmg-debug / ci (ubuntu-20.04, off, off, off, off, int32_t)	1h 12m 23s
mmg-debug / ci (macos-12, on, off, on, off, int32_t)	38m 53s
mmg-debug / ci (macos-12, on, off, off, off, int32_t)	56m 5s
mmg-debug / ci (macos-12, off, off, on, off, int32_t)	36m 31s
mmg-debug / ci (macos-12, off, off, off, off, int32_t)	40m 48s
mmg-debug / ci (ubuntu-20.04, off, off, off, on, int32_t)	3m 37s
mmg-debug / ci (macos-12, off, off, off, on, int32_t)	7m 33s
mmg-debug / ci (ubuntu-20.04, off, on, on, off, int32_t)	1h 2m 44s
mmg-debug / ci (macos-12, off, on, on, off, int32_t)	32m 2s
mmg-debug / ci (windows-2022, off, off, off, off, int32_t)	54m 24s
mmg-debug / ci (windows-2022, on, off, off, off, int32_t)	53m 56s
mmg-debug / ci (windows-2022, off, on, off, off, int32_t)	56m 46s
mmg-debug / ci (ubuntu-20.04, on, on, on, on, int64_t)	4m 46s
mmg-debug / ci (ubuntu-20.04, off, off, on, on, int64_t)	1h 11m 32s
mmg-debug / ci (ubuntu-20.04, off, off, off, off, int64_t)	1m 52s
mmg-debug / ci (macos-12, on, on, on, on, int64_t)	7m 25s
mmg-debug / ci (macos-12, off, off, off, off, int64_t)	4m 4s
mmg-debug / ci (windows-2022, on, on, off, off, int64_t)	6m 9s
mmg-debug / ci (windows-2022, off, off, off, off, int64_t)	4m 43s
mmg-debug / upload_coverage	2m 9s
	14h 17m 25s

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