Re-enable backdrop-filter-transform tests

The bug blocking them has been fixed. This re-enables the tests while
also introducing baselines, which account for some minor anti-aliasing
at the borders. There is no longer the background bleeding through

TBR=backer@chromium.org
TEST=blink_web_tests
css3/filters/backdrop-filter-transform.html
Bug: 1044032

Change-Id: I2d787df9d7cb311aab42addda0833e64830b74f6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2072309Reviewed-by: Jonathan Ross <jonross@chromium.org>
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#744914}

third_party/blink/web_tests/TestExpectations

@@ -6578,10 +6578,6 @@ crbug.com/1043675 [ Linux ] virtual/threaded-no-composited-antialiasing/animatio
 crbug.com/1043675 [ Linux ] virtual/threaded-no-composited-antialiasing/animations/missing-values-first-keyframe.html [ Failure ]
 crbug.com/1043675 [ Linux ] virtual/threaded-no-composited-antialiasing/animations/missing-values-last-keyframe.html [ Failure ]
 
-# The transformed region bleeds into the foreground with SkiaRenderer enabled.
-crbug.com/1044032 [ Linux ] css3/filters/backdrop-filter-transform.html [ Failure ]
-crbug.com/1044032 [ Linux ] virtual/scalefactor200/css3/filters/backdrop-filter-transform.html [ Failure ]
-
 # Required to land DevTools change
 crbug.com/106759 http/tests/devtools/command-line-api-inspect.js [ Pass Failure ]
 crbug.com/106759 http/tests/devtools/sources/debugger-breakpoints/restore-locations-for-breakpoint-with-broken-source-map.js [ Pass Failure ]