Roll ICU and correct timezone test

Bug: v8:12301
Change-Id: Ia87943478c1b67c077a18785668c485c404cd5dd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3235814Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77505}

DEPS

@@ -228,7 +228,7 @@ deps = {
   'third_party/googletest/src':
     Var('chromium_url') + '/external/github.com/google/googletest.git' + '@' + '16f637fbf4ffc3f7a01fa4eceb7906634565242f',
   'third_party/icu':
-    Var('chromium_url') + '/chromium/deps/icu.git' + '@' + '4df07a2d158218b77369b82f9fe3190725beb815',
+    Var('chromium_url') + '/chromium/deps/icu.git' + '@' + 'eedbaf76e49d28465d9119b10c30b82906e606ff',
   'third_party/instrumented_libraries':
     Var('chromium_url') + '/chromium/src/third_party/instrumented_libraries.git' + '@' + '3c149f5611237dc59a7ec229e8ea009d8be8f51d',
   'third_party/ittapi': {

test/intl/regress-1074578.js

@@ -36,7 +36,8 @@ const d4 = new Date("2021-03-09T00:00Z");
 assertEquals("March 8, 2020 at 5:00:00 PM PDT", df2.format(d3));
 
 // Before tz2020a change will get "March 8, 2021 at 4:00:00 PM PST"
-assertEquals("March 8, 2021 at 5:00:00 PM MST", df2.format(d4));
+// After tz2021a1 it now become "March 8, 2021 at 5:00:00 PM GMT-7".
+assertEquals("March 8, 2021 at 5:00:00 PM GMT-7", df2.format(d4));
 
 // C. Test America/Nuuk renamed from America/Godthab.