[Managed Iceberg] Cleanup SerializedDataFile; use ByteBuffer instead

[ahmedabu98]

We were using a workaround because of an issue in ByteBuddy (#32701). This has been fixed so we can now use ByteBuffer normally

Note that this is an update compatible change because byte[] and ByteBuffer types will both map to the same BYTES Schema type

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[ahmedabu98]

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[github-actions]

Reminder, please take a look at this pr: @kennknowles @Abacn @damondouglas

[Abacn]

LGTM, however I saw one of the fixes was reverted: #32701 (comment), feel free to merge if get confirm that the original issue indeed fixed and stablelized

[github-actions]

Reminder, please take a look at this pr: @kennknowles @Abacn @damondouglas

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Reminder, please take a look at this pr: @robertwb @damccorm @chamikaramj

[damccorm]

What is the current status here? It looks like we have a LGTM but checks are failing

[ahmedabu98]

The PR that fixed the original issue was reverted, so we'll wait until a future fix gets in. This change isn't urgent in any way, so will turn it into a draft until then

[github-actions]

Reminder, please take a look at this pr: @robertwb @damccorm @chamikaramj

[ahmedabu98]

Waiting on author

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Assigning new set of reviewers because Pr has gone too long without review. If you would like to opt out of this review, comment assign to next reviewer:

R: @kennknowles for label java.
R: @Abacn for label build.
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