[LCPP] Make LCPP web_tests exclusive to VirtualTests

Based on the feedback on crrev.com/c/4767918, this CL switches
LCPP web_tests to be exclusively virtual and drops
the TestExpectations.

Bug: 1419756
Change-Id: Ib5acfd90b68d136ee526edfa8d419988b7d5e405
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4792062
Reviewed-by: Weizhong Xia <weizhong@google.com>
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Commit-Queue: Kouhei Ueno <kouhei@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1187421}

third_party/blink/web_tests/TestExpectations

@@ -6656,9 +6656,6 @@ crbug.com/626703 virtual/css-highlight-overlay-painting/external/wpt/css/css-hig
 # Gardening 2023-07-06
 crbug.com/1462500 [ Win ] media/picture-in-picture/picture-in-picture-interstitial-sizing.html [ Failure Pass ]
 
-# Until LCPP is unflagged, LCPP tests run in virtual tests.
-crbug.com/1419756 http/tests/lcp_critical_path_predictor/* [ Crash Failure ]
-
 # Accessibility causes unrelated rendering change
 crbug.com/1470474 fast/ruby/ruby-position-modern-japanese-fonts.html [ Failure Pass ]
 

third_party/blink/web_tests/VirtualTestSuites

@@ -2423,6 +2423,7 @@
     "bases": [
       "http/tests/lcp_critical_path_predictor"
     ],
+    "exclusive_tests": "ALL",
     "args": [
       "--enable-features=LCPCriticalPathPredictor",
       "--disable-threaded-compositing", "--disable-threaded-animation"