[WebGPU] no need to clear destroyed textures

https://bugs.webkit.org/show_bug.cgi?id=273570
<radar://127364747>

Reviewed by Cameron McCormack.

Destroyed textures act like valid objects but no operations
including clearing should occur on them.

* LayoutTests/TestExpectations:
* LayoutTests/fast/webgpu/fuzz-273570-expected.txt: Added.
* LayoutTests/fast/webgpu/fuzz-273570.html: Added.
Add regression test.

* Source/WebGPU/WebGPU/Texture.mm:
(WebGPU::Texture::previouslyCleared const):

Canonical link: https://commits.webkit.org/278337@main

LayoutTests/TestExpectations

@@ -2110,6 +2110,8 @@ webkit.org/b/139639 [ Debug ] cssom/non-subpixel-scroll-top-left-values.html [ S
 [ Release ] fast/webgpu/fuzz-273323.html [ Pass Failure Timeout ]
 [ Debug ] fast/webgpu/fuzz-273573.html [ Skip ]
 [ Release ] fast/webgpu/fuzz-273573.html [ Pass Failure Timeout ]
+[ Debug ] fast/webgpu/fuzz-273570.html [ Skip ]
+[ Release ] fast/webgpu/fuzz-273570.html [ Pass Failure Timeout ]
 
 # Imported W3C HTML/DOM ref tests that are failing.
 imported/w3c/web-platform-tests/html/dom/elements/global-attributes/dir_auto-textarea-script-N-between-Rs.html [ ImageOnlyFailure ]