Ensure filter/repeat is cached by Viewport texture in GL Compatibility renderer

[clayjohn]

Fixes: #76006

Since we were setting repeat/filter manually the state wasn't properly tracked in the Texture class. So when we go to update the state at draw time the GL calls weren't getting made.

[akien-mga]

Thanks!

[arkology]

This potentially caused regression in my project (it it is the only change in viewport textures between beta 2 and 3? Anyway I can see it only in Compatibility renderer), but ATM I can't reproduce it to create MRP (use in shaders, get just black rectangle, in editor everything fixes after selection corresponding subviewport node). So just leaving a comment here so I don't forget to come back to the problem during the weekend.
UPD: Looks like everything breaks when using filter_ for sampler2D. So this PR definitely the source of regression. Should dig deeper before opening new issue

[clayjohn]

@arkology if you have an MRP, I can take a look.