Increase experimental to 50% for fuchsia-compile-x64-dbg

Bug: 1001643
Change-Id: I2bf3e664a720055baa91bd062f170b70d77ee226
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1893407Reviewed-by: Aaron Gable <agable@chromium.org>
Commit-Queue: Haiyang Pan <hypan@google.com>
Cr-Commit-Position: refs/heads/master@{#714715}

infra/config/buckets/try.star

@@ -1175,7 +1175,7 @@ linux_builder(
 linux_builder(
     name = 'fuchsia-compile-x64-dbg',
     tryjob = tryjob(
-        experiment_percentage = 20,
+        experiment_percentage = 50,
     ),
 )
 

infra/config/generated/commit-queue.cfg

@@ -187,7 +187,7 @@ config_groups: <
       >
       builders: <
         name: "chromium/try/fuchsia-compile-x64-dbg"
-        experiment_percentage: 20
+        experiment_percentage: 50
       >
       builders: <
         name: "chromium/try/fuchsia-x64-cast"

infra/config/generated/cq-builders.md

@@ -335,7 +335,7 @@ as required builders.
   * Experiment percentage: 50
 
 * [fuchsia-compile-x64-dbg](https://ci.chromium.org/p/chromium/builders/try/fuchsia-compile-x64-dbg) ([definition](https://cs.chromium.org/search?q=package:%5Echromium$+file:/cq.star$+-file:/beta/+-file:/stable/+fuchsia-compile-x64-dbg)) ([matching builders](https://cs.chromium.org/search?q=+file:trybots.py+fuchsia-compile-x64-dbg))
-  * Experiment percentage: 20
+  * Experiment percentage: 50
 
 * [ios-device](https://ci.chromium.org/p/chromium/builders/try/ios-device) ([definition](https://cs.chromium.org/search?q=package:%5Echromium$+file:/cq.star$+-file:/beta/+-file:/stable/+ios-device)) ([matching builders](https://cs.chromium.org/search?q=+file:trybots.py+ios-device))
   * Experiment percentage: 10