[maglev] Enable the maglev variant on FYI bots

Bug: v8:7700
Change-Id: I6e77592e6a3603533414971b59ef1fb9b2f89657
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3629150Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Jakob Linke <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80367}

infra/testing/builders.pyl

@@ -408,6 +408,8 @@
       {'name': 'webkit', 'variant': 'stress_sampling'},
       # Stress snapshot.
       {'name': 'mjsunit', 'variant': 'stress_snapshot'},
+      # Maglev.
+      {'name': 'mjsunit', 'variant': 'maglev'},
       # Experimental regexp engine.
       {'name': 'mjsunit', 'variant': 'experimental_regexp'},
       # Wasm write protect code space.
@@ -1251,6 +1253,8 @@
       {'name': 'webkit', 'variant': 'stress_sampling'},
       # Stress snapshot.
       {'name': 'mjsunit', 'variant': 'stress_snapshot'},
+      # Maglev.
+      {'name': 'mjsunit', 'variant': 'maglev'},
       # Experimental regexp engine.
       {'name': 'mjsunit', 'variant': 'experimental_regexp'},
       # Wasm write protect code space.
@@ -1313,6 +1317,8 @@
       {'name': 'webkit', 'variant': 'stress_sampling'},
       # Stress snapshot.
       {'name': 'mjsunit', 'variant': 'stress_snapshot'},
+      # Maglev.
+      {'name': 'mjsunit', 'variant': 'maglev'},
       # Experimental regexp engine.
       {'name': 'mjsunit', 'variant': 'experimental_regexp'},
       # Wasm write protect code space.