Integrate std::pmr memory tracking for class ArraySchema.

[abigalekim]

All member vector and unordered map variables of the ArraySchema class have PMR tracking. Code compiles and tests pass.

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TYPE: NO_HISTORY DESC: Integrate std::pmr memory tracking for class ArraySchema.

[shortcut-integration[bot]]

This pull request has been linked to Shortcut Story #40462: Integrate std::prm memory tracking for class ArraySchema..

[davisp]

Also, given the base branch setup, its vaguely odd that this contains the tdb::pmr::unordered_map change. We'll need to make sure and get that figure out since you've got it in a separate PR (which is great!). For now it shouldn't hurt anything, but just let me know when you're ready and I can rework the history to get that straightened out.