GH-40025: [C++][FS][Azure] Implement Move() for flat namespace storage accounts

[felipecrv]

Rationale for this change

Move is currently only supported on HNS-enabled storage accounts.

What changes are included in this PR?

Implementation of all the checks + a TODO on the actual blob moves.

Are these changes tested?

• By the same tests that cover the HNS storage account Move (pending removal of a conditional)

• GitHub Issue: [C++][FS][Azure] Implement Move() for flat namespace storage accounts #40025

[felipecrv]

@Tom-Newton Not fully implemented yet, but most of the annoying checks are out of the way.

[felipecrv]

As explained in issue #40405 I decided to not continue the work on this operation and proposed a PR that returns a better error messages to users trying to use the unsupported Move (#40406). I will keep the branch available for anyone that wants to continue the work.