Reland "Update PrimitiveTopologyTests to use WGSL"

This reverts commit ad0bec6c96965e82a8f0b967ce7a97d658c1d62a.

Reason for revert: The change was incorrectly blamed for a autoroll failure and reverted unnecessarily.

Original change's description:
> Revert "Update PrimitiveTopologyTests to use WGSL"
>
> This reverts commit b9641b8225b82cfda56c3e0544cea041172deef7.
>
> Reason for revert: Suspect causing Dawn roll to fail
>
> Original change's description:
> > Update PrimitiveTopologyTests to use WGSL
> >
> > A rebased fork of https://dawn-review.googlesource.com/c/dawn/+/33774
> >
> > Bug: dawn:572
> > Change-Id: Icb24ac5b62984e9b093e61077155b9a1eafb344b
> > Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/35801
> > Commit-Queue: Ben Clayton <bclayton@google.com>
> > Auto-Submit: Ben Clayton <bclayton@google.com>
> > Reviewed-by: Austin Eng <enga@chromium.org>
> > Reviewed-by: Corentin Wallez <cwallez@chromium.org>
>
> TBR=cwallez@chromium.org,enga@chromium.org,bclayton@google.com
>
> Change-Id: Ib6fe527f28cf17f8f8e817c59121e357b9b65cd1
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: dawn:572
> Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/36520
> Reviewed-by: Austin Eng <enga@chromium.org>
> Commit-Queue: Austin Eng <enga@chromium.org>

TBR=cwallez@chromium.org,enga@chromium.org,bclayton@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: dawn:572
Change-Id: I2e8859c9b9f12c005bef1309c7bad98f61af2ac7
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/36842
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
diff --git a/src/tests/end2end/PrimitiveTopologyTests.cpp b/src/tests/end2end/PrimitiveTopologyTests.cpp
index be3e9e9..b103aab 100644
--- a/src/tests/end2end/PrimitiveTopologyTests.cpp
+++ b/src/tests/end2end/PrimitiveTopologyTests.cpp
@@ -151,9 +151,6 @@
     void SetUp() override {
         DawnTest::SetUp();
 
-        // TODO(crbug.com/tint/398): GLSL builtins don't work with SPIR-V reader.
-        DAWN_SKIP_TEST_IF(HasToggleEnabled("use_tint_generator"));
-
         renderPass = utils::CreateBasicRenderPass(device, kRTSize, kRTSize);
 
         vsModule = utils::CreateShaderModuleFromWGSL(device, R"(