Update --new-gradle-bot to use r8lib

Bug: b/270105162
Change-Id: I8a3b434d4bb7bef96989afa16726979981e70d22
diff --git a/infra/config/global/generated/cr-buildbucket.cfg b/infra/config/global/generated/cr-buildbucket.cfg
index 1c1f973..4cac940 100644
--- a/infra/config/global/generated/cr-buildbucket.cfg
+++ b/infra/config/global/generated/cr-buildbucket.cfg
@@ -1105,7 +1105,6 @@
         '    "--runtimes=dex-default",'
         '    "--command_cache_dir=/tmp/ccache",'
         '    "--new-gradle",'
-        '    "--no-r8lib",'
         '    "--tool=r8",'
         '    "--no_internal",'
         '    "--one_line_per_test",'
diff --git a/infra/config/global/main.star b/infra/config/global/main.star
index aca08c1..9013087 100755
--- a/infra/config/global/main.star
+++ b/infra/config/global/main.star
@@ -312,7 +312,7 @@
   dimensions = get_dimensions(normal=True),
   max_concurrent_invocations = 1,
   properties = {
-    "test_options" : ["--runtimes=dex-default", "--command_cache_dir=/tmp/ccache", "--new-gradle", "--no-r8lib"] + common_test_options,
+    "test_options" : ["--runtimes=dex-default", "--command_cache_dir=/tmp/ccache", "--new-gradle"] + common_test_options,
     "builder_group" : "internal.client.r8"
   }
 )