infra: Whitelist only googlers for chrome/try CQ verifiers.

Not sure if this will work. But theoretically this will prevent
non-googlers from adding these trybots onto their CL via
"cq_include_trybots" footer.

If this works, we'll be able to trim down (but not fully delete) the
code at http://shortn/_Nxx3vpeckc.

Bug: 1047347
Change-Id: Idf1b95b5ee258e8a30d21dd480558861082f1f3c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2032025
Commit-Queue: Ben Pastene <bpastene@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@google.com>
Reviewed-by: Aaron Gable <agable@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737086}

infra/config/buckets/try.star

@@ -1195,6 +1195,7 @@ def chrome_internal_verifier(
       builder = 'chrome:try/' + builder,
       cq_group = 'cq',
       includable_only = True,
+      owner_whitelist = ["googlers"],
   )
 
 chrome_internal_verifier(

infra/config/generated/commit-queue.cfg

@@ -32,30 +32,37 @@ config_groups: <
       builders: <
         name: "chrome/try/chromeos-betty-chrome"
         includable_only: true
+        owner_whitelist_group: "googlers"
       >
       builders: <
         name: "chrome/try/chromeos-betty-pi-arc-chrome"
         includable_only: true
+        owner_whitelist_group: "googlers"
       >
       builders: <
         name: "chrome/try/chromeos-eve-compile-chrome"
         includable_only: true
+        owner_whitelist_group: "googlers"
       >
       builders: <
         name: "chrome/try/chromeos-kevin-compile-chrome"
         includable_only: true
+        owner_whitelist_group: "googlers"
       >
       builders: <
         name: "chrome/try/ipad-device"
         includable_only: true
+        owner_whitelist_group: "googlers"
       >
       builders: <
         name: "chrome/try/iphone-device"
         includable_only: true
+        owner_whitelist_group: "googlers"
       >
       builders: <
         name: "chrome/try/linux-chromeos-chrome"
         includable_only: true
+        owner_whitelist_group: "googlers"
       >
       builders: <
         name: "chromium/try/android-10-arm64-rel"