Eliminate `PublicKey` from `isAddressLookupTableAccount`

[steveluscher]

We don't need an entire PublicKey instance just to assert on the address of the owner.

Test Plan

1. Visit https://explorer-git-10-18-overrideavsctov577onnpm-solana-labs.vercel.app/address/DnXcJm7zT3cWYXTUaf9Mww2Q12EEwuuU5LtvQzV8ZvzQ/entries?cluster=devnet

Observe table entries are there.

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Name	Status	Preview	Comments	Updated (UTC)
explorer	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 18, 2023 3:52am

[steveluscher]

Current dependencies on/for this PR:

• master
  • PR #305
  • PR #303
    • PR #304 👈

This comment was auto-generated by Graphite.

[steveluscher]

Merge activity

• Oct 17, 8:49 PM: @steveluscher started a stack merge that includes this pull request via Graphite.
• Oct 17, 8:50 PM: Graphite rebased this pull request as part of a merge.
• Oct 17, 8:52 PM: @steveluscher merged this pull request with Graphite.