[WIP] implement necessary uninitcopy

[correaa]

Proposed changes

to fight ADL-unfriendly types used in AFQMC

This change is necessary for multi to be able to call uninitialized_copy generically from subarray -> array construction

What type(s) of changes does this code introduce?

• Refactoring (no functional changes, no api changes)

Does this introduce a breaking change?

• No

What systems has this change been tested on?

Checklist

• Yes. This PR is up to date with current the current state of 'develop'
• No. Code added or changed in the PR has been clang-formatted
• No. This PR adds tests to cover any new code, or to catch a bug that is being fixed
• No. Documentation has been added (if appropriate)

[PDoakORNL]

So is this PR still alive?

[correaa]

this is either solved or outdated. can be closed.