token 2022 test: refactor transfer hook test to use new offchain helper

[buffalojoec]

Following up from the new helpers added in #6099 and #6100, there's a transfer
hook test in program-2022-test that's using the now-deprecated helper to build
a swap instruction for the test program.

This PR replaces that bit of code to use the new helper from
spl_transfer_hook_interface.

Note: The test in question is designed to test Token2022's
invoke_transfer_checked(..) on-chain helper, not the offchain helpers. So,
it's appropriate to use the offchain helper directly from the interface crate
for this step.

[buffalojoec]

Current dependencies on/for this PR:

• master
  • PR transfer hook: add new offchain helper #6099
    • PR token 2022: add new offchain helper #6100
      • PR token client: refactor transfer to use new offchain helper #6107
        • PR token 2022 test: refactor transfer hook test to use new offchain helper #6110 👈
          • PR transfer hook: add new onchain helper #6111
            • PR token 2022: repair onchain helper #6112
              • PR token js: create new offchain helper #6108

This stack of pull requests is managed by Graphite.

[buffalojoec]

Merge activity

• Jan 11, 4:15 PM: @buffalojoec started a stack merge that includes this pull request via Graphite.
• Jan 11, 4:19 PM: Graphite rebased this pull request as part of a merge.
• Jan 11, 4:20 PM: @buffalojoec merged this pull request with Graphite.

Pull request has been modified.