WIP: Linear multistep Patankar schemes #1069

Job	Run time
ubuntu-latest - Julia 1.10 - pull_request	47m 0s
macOS-latest - Julia 1.10 - pull_request	1h 15m 56s
windows-latest - Julia 1.10 - pull_request	57m 1s
ubuntu-latest - Julia 1.11 - pull_request	1h 12m 35s
finish	1m 19s
	4h 13m 51s

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