Roll Tint from ba1a8f8d05 to 7e6989bc26 (5 revisions)

https://dawn.googlesource.com/tint.git/+log/ba1a8f8d05e9..7e6989bc26d8

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/tint-dawn
Please CC bajones@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Dawn: https://bugs.chromium.org/p/dawn/issues/entry

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Bug: None
Tbr: bajones@google.com
Change-Id: Ied1e716d12b9198f8cf9ae227eafc72e2de17e54
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/77981
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -113,7 +113,7 @@ deps = {
 
   # WGSL support
   'third_party/tint': {
-    'url': '{dawn_git}/tint@ba1a8f8d05e97687fb3a3fd1d1c250af7af6d22b',
+    'url': '{dawn_git}/tint@7e6989bc26d87c4f946b359c84fc5b099009cac0',
   },
 
   # GLFW for tests and samples