Add simple in-memory provider configure extension

[WeihanLi]

Summary of the changes

• Add simple in-memory provider configure extensions

Contribute to #25192

[ajcvickers]

@WeihanLi See #25487. We're not convinced this is a good idea, since we recommend people don't use the in-memory provider.

[WeihanLi]

@ajcvickers thanks for your reply, I think in-memory provider is not recommended for common business, but is recommended for test, so maybe this would make the in-memory provider register more easier

[roji]

@WeihanLi the use of the in-memory provider is strongly discouraged also for testing purposes, see the docs.

[WeihanLi]

Get it, thanks @roji