Clone for IncrementalHash and KMAC

[vcsjones]

Closes #103170

[dotnet-issue-labeler]

Note regarding the new-api-needs-documentation label:

This serves as a reminder for when your PR is modifying a ref *.cs file and adding/modifying public APIs, please make sure the API implementation in the src *.cs file is documented with triple slash comments, so the PR reviewers can sign off that change.

[dotnet-issue-labeler]

Note regarding the new-api-needs-documentation label:

This serves as a reminder for when your PR is modifying a ref *.cs file and adding/modifying public APIs, please make sure the API implementation in the src *.cs file is documented with triple slash comments, so the PR reviewers can sign off that change.

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-security, @bartonjs, @vcsjones
See info in area-owners.md if you want to be subscribed.

[vcsjones]

/azp run runtime-androidemulator, runtime-wasm, runtime-ioslikesimulator

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).

[bartonjs]

Just a couple of superfluous blank lines. If removing them would put making the preview 6 cutoff (Tuesday afternoon, PT) at risk, merge with them here. If you have the time, I'd prefer them tidied up.

[vcsjones]

Since the only change from the last run was white space changes, I am not going to run the Android / iOS / Browser legs again. And because they did not fail in S.S.Cryptography, merging.