Revert "Fix memory leak in TiffEncode"

[wiredfool]

This reverts commit e2e40c54568236d2504921eb0b335cdab734a7d5.

Fixes https://github.com/python-pillow/Pillow/pull/8954#issuecomment-2929027106 .

Changes proposed in this pull request:

• This reverts moving the cleanup for tiff encode into the cleanup function, as opposed to doing it in the actual encode
• This is an intermittent issue on several of the platforms, it reasonably triggers using pytest -v --random-order Tests/test_file_libtiff.py on pypy3.10 on linux-x64
• There's likely something else going on here, because the errors are on read and the changes are for write.

[radarhere]

I've created #9002 as a possible alternative.

[wiredfool]

I saw that, I haven't had a chance to test it yet. Probably Friday.

[radarhere]

In the absence of any further discussion, I'll merge #9002 sometime in the next few days.

We're coming up on the release, and I would rather not merge it at the last minute.

[radarhere]

#9002 has ben merged.