Add a try builder to run boringssl presubmits

We now have a few more PRESUBMIT.py checks in the codebase. Not everyone
runs these before uploading (e.g. folks who don't use depot_tools), so
add coverage on the CQ itself. Adds this new builder as includable_only,
since it might take a bit of troubleshooting to get it working. It will
be enabled by default once it's working.

Change-Id: Ide54a983b9abf280dd1a8e1be15839336a6a6964
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/84809
Auto-Submit: Lily Chen <chlily@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

infra/config/generated/commit-queue.cfg

diff --git a/infra/config/generated/commit-queue.cfg b/infra/config/generated/commit-queue.cfg
index c8b8361..e52b2ad 100644
--- a/infra/config/generated/commit-queue.cfg
+++ b/infra/config/generated/commit-queue.cfg
@@ -194,6 +194,10 @@
         name: "boringssl/try/mac_small"
       }
       builders {
+        name: "boringssl/try/presubmit"
+        includable_only: true
+      }
+      builders {
         name: "boringssl/try/win32"
         includable_only: true
       }

infra/config/generated/cr-buildbucket.cfg

diff --git a/infra/config/generated/cr-buildbucket.cfg b/infra/config/generated/cr-buildbucket.cfg
index 39e2875..ec93e53 100644
--- a/infra/config/generated/cr-buildbucket.cfg
+++ b/infra/config/generated/cr-buildbucket.cfg
@@ -2247,6 +2247,21 @@
       service_account: "boringssl-try-builder@chops-service-accounts.iam.gserviceaccount.com"
     }
     builders {
+      name: "presubmit"
+      swarming_host: "chromium-swarm.appspot.com"
+      dimensions: "cpu:x86-64"
+      dimensions: "os:Ubuntu-24.04"
+      dimensions: "pool:luci.flex.try"
+      recipe {
+        name: "presubmit"
+        cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
+        cipd_version: "refs/heads/main"
+        properties_j: "repo_name:\"boringssl\""
+      }
+      execution_timeout_secs: 1800
+      service_account: "boringssl-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+    }
+    builders {
       name: "win32"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cpu:x86-64"

infra/config/main.star

diff --git a/infra/config/main.star b/infra/config/main.star
index dccedd4..e24c102 100755
--- a/infra/config/main.star
+++ b/infra/config/main.star
@@ -346,6 +346,17 @@
 # properties rather than parsing names. Then we can add new configurations
 # without having to touch multiple repositories.
 
+cq_builder(
+    "presubmit",
+    LINUX_HOST,
+    recipe = "presubmit",
+    # TODO(chlily): Enable when ready.
+    cq_enabled = False,
+    properties = {
+        "repo_name": "boringssl",
+    },
+)
+
 both_builders(
     "android_aarch64",
     WALLEYE_HOST,