Improve CreateDirectory on Windows

[tmds]

The CreateDirectory implementation was improved on Unix by #58799 and #61777.

The first PR eliminates exists syscalls by deducting that information from the directory creation syscall. The second PR reduces allocations when creating parent directories by allocating the parent paths on the stack instead of creating strings.

Similar improvements can be made to the Windows implementation.

cc @adamsitnik @danmoseley

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Issue Details

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The CreateDirectory implementation was improved on Unix by #58799 and #61777.

The first PR eliminates exists syscalls by deducting that information from the directory creation syscall. The second PR reduces allocations when creating parent directories by allocating the parent paths on the stack instead of creating strings.

Similar improvements can be made to the Windows implementation.

cc @adamsitnik @danmoseley

Author:	tmds
Assignees:	-
Labels:	area-System.IO, tenet-performance, up-for-grabs
Milestone:	-

[danmoseley]

@iSazonov you thumbsed up this, any interest in a PR? Seems relevant to Powershell. 😸

[iSazonov]

@danmoseley PowerShell MSFT team agreed that PS community will start experimental work on new File System Provider in next milestone. We already have some API enhancement requests (important for PowerShell) in .Net repository and I hope we get them early so that we have a time for adoption. I ping-ed .Net in one issue but without answer - but I hope.
As for the issue, it is nice to have but it is not so critical as issues I mentioned.

[deeprobin]

Would like to have a look :)
If you want you can assign the issue to me.

I hope I can improve the performance in FileSystem.DirectoryCreation.Windows.cs

[danmoseley]

@deeprobin it's yours.