WT-13851 Rename two live restore types

[luke-pearson]

This is a trivial change that renames the following:

• WT_DESTINATION_METADATA -> WT_LIVE_RESTORE_DESTINATION_METADATA
• WT_LIVE_RESTORE_HOLE_LIST -> WT_LIVE_RESTORE_HOLE_NODE

[github-actions]

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Type of change made in this PR

• Functional change
• Test-only change
• Refactor-only change
• Other non-functional change

What makes this change safe?

Very low risk, two renames. Given how low risk it is PR testing is sufficient to capture any failure modes.

Checklist before requesting a review

• I have performed a self-review of my code.
• I have made corresponding changes to the documentation, or no documentation change is needed.
• I have tests that show my change is correct, or have described above why functional test changes are not required.

[wiredtiger-prbot]

Metric (for added/changed code)	Coverage
Line coverage	0% (0/13)
Branch coverage	N/A

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[zunyiliu]

LGTM, just a heads up, as my PR has merged into develop which will conflict with this change, please pull develop and fix that, thank you Luke!