WebGL2 deferred rendering breaks when anisotropy is enabled

[DGriffin91]

Bevy version 5876352206d1bcea792825bf013eb212383b73d6 and v0.14.0-rc.4

The deferred rendering example is broken on WebGL2.

The issue was introduced at https://github.com/bevyengine/bevy/commit/df8ccb873582fa3193d0e570c2534b0bd33316b3 with https://github.com/bevyengine/bevy/pull/13450

panicked at [...]\.cargo\registry\src\index.crates.io-6f17d22bba15001f\wgpu-hal-0.19.4\src\gles\command.rs:756:21:
index out of bounds: the len is 16 but the index is 16