fix(rust): Revert "Add RLE to RLE_DICTIONARY encoder"

[nameexhaustion]

Reverts #15959

[ritchie46]

Yes, I did a git bisect and this was the one. 👍

[nameexhaustion]

The test case I'll probably put in a future PR, but for now I've checked locally that this revert fixes it.

[thalassemia]

So sorry for this and thank you for fixing it! I should have written a test with more random, realistic data so this could have been caught before merging. Could I try this again with more robust testing?

[ritchie46]

Of course! Don't sweat it. That can happen. 👍

[Alex23rodriguez]

Happened to me too. A 1 was getting changed to a 5 somewhere in a 1.5M row dataframe...
It would be good is this was added to the release notes of 0.20.25 so people know not to use 0.20.24

[stinodego]

Happend to me to. A 1 was getting changed to a 5 somewhere in a 1.5M row dataframe... It would be good is this was added to the release notes of 0.20.25 so people know not to use 0.20.24

Good point - I updated the release notes!