Avoid per-epoch limit for refunding

[yito88]

Describe your changes

Closes #4938.

Checklist before merging

• If this PR has some consensus breaking changes, I added the corresponding breaking:: labels
  • This will require 2 reviewers to approve the changes
• If this PR requires changes to the docs or specs, a corresponding PR is opened in the namada-docs repo
  • Relevant PR if applies:
• If this PR affects services such as namada-indexer or namada-masp-indexer, a corresponding PR is opened in that repo
  • Relevant PR if applies:

[mergify]

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[brentstone]

@yito88 want to make sure - this closes #4938 right?

[yito88]

Yes, this closes #4938. Thanks for the update

[sug0]

these two unit tests are now failing:

    vp::tests::test_timeout_on_close_packet
    vp::tests::test_timeout_packet

[sug0]

lgtm. please add a changelog

[brentstone]

Is this rdy for merge? @yito88 @tzemanovic @sug0

[sug0]

@brentstone it's ready, but I was waiting on #4939 to be approved+merged, since this PR is pretty simple, but it would introduce conflicts on #4939