Using resource.set_texture changes texture of ALL sprites using same atlas

[BitsAtPlayDev]

**Describe the bug **
Using resource.set_texture on any sprite, changes texture on ALL sprites using same atlas

**To Reproduce **

1. Create an empty project
2. Create two sprites using the same atlas (The sprites can refer to same image within atlas, or different images)
3. Use example code from 'resource.set_texture()" entry in API docs to update texture of one of the sprites
4. Both sprites have been updated to use new texture

**Expected behavior **
Only sprite referred to in call to 'set_texture' should have it's texture updated.

**Defold version: **

• Version 1.3.0

**Platforms : **

• Platforms: Android, MacOS
• OS: Android 8.0.0; MacOS Montery 12.1
• Device: LG G6

**Minimal repro case project: **
There are two attachments: One using custom sprite materials & custom render-script, one using the default sprite materials & default render-script

SetTextureProblem_customMaterials.zip
SetTextureProblem_defaultMaterials.zip

[JCash]

That is true, if you replace the texture, you replace the entire texture.
We currently don't have support to update a region of the texture.

As such, this is not a bug.
But perhaps you wish to file a feature request for support of getting the region/uv-coords of a sprite image inside an atlas. With that info, we can implement support for setting a sub-part of the a texture.