[Parquet] Add Unbuffered writer to TrackedWrite

[PiotrSrebrny]

Which issue does this PR close?

• Closes [Parquet] ArrowWriter flush does not work #8534.

Are these changes tested?

Changes where not tested and should be covered by existing.

Are there any user-facing changes?

The patch removes BufWriter from TrackedWrite, thus ArrowWrite no longer wraps the provided Write with it. If the underlying writer performs poorly with small, repeated writes (e.g., a TCP socket), a user should add the BufWriter wrapping for its writer for better performance.

[tustvold]

I think I would prefer to:

• Fix flush
• Add a separate option to create an unbuffered writer

See #8534 (comment)

[PiotrSrebrny]

I am fine with this, I can add new_unbuffered() function to TrackedWrite

[PiotrSrebrny]

I will have to add unbuffered option to the WriterProperties that gets propagated from ArrowWriter to the SerializedFileWriter to make it work.

[etseidl]

Marking this as draft since it's superseded by #8586.