Revert recent anti-aliasing improvements (#24289)

This reverts commit 31fa4144226fcbd140bb4f26d80001f0abd6facd.
This reverts commit b9e0aae49fad996ddb0ce55225873e5c1d5abecd.

`lyon` commit revert:

![image](https://github.com/user-attachments/assets/0243f61c-0713-416d-b8db-47372e04abaa)

`MSAA` commit revert:

![image](https://github.com/user-attachments/assets/b1a4a9fe-0192-47ef-be6f-52e03c025724)

cc @huacnlee , @\as-cii had decided to revert this PR due to a selection
right corner rendering bug.
Not sure what to propose for a fix from my side

Release Notes:

- N/A