Change glslang.js CIPD dependency to copy instead of symlink

This seems to be necessary to capture them in a test isolate
(instead of capturing hollow symlinks).

Bug: 1069302
Change-Id: If2c3b2594d05b647d3f6e6a947f5dc0ab26a6444
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2145702Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#758551}

DEPS

@@ -1458,7 +1458,7 @@ deps = {
     'packages': [
       {
         'package': 'chromium/third_party/glslang_js',
-        'version': 'IB6pL73YKdgoiK7Ea7U5Uw_XjzXGZJCB0I3LhaiYY-sC',
+        'version': 'Zka0-f53_HEAZ1bpsxr9BSi7P51-4bzYwSMg0RMKX1AC',
       },
     ],
     'dep_type': 'cipd',

third_party/blink/web_tests/wpt_internal/webgpu/third_party/glslang_js/cipd.yaml

@@ -3,3 +3,5 @@ description: 'JS+WASM build of glslang (Khronos reference front-end for GLSL and
 data:
   - file: lib/glslang.js
   - file: lib/glslang.wasm
+# Copy instead of symlink so that these files are captured properly in a test isolate.
+install_mode: copy