Target macOS 15 or 26 on CI and Try Mac builders

To facilitate upgrading the OS on the bots.

Bug: b/493610839
Change-Id: Iabc35ce2e98d4e218cd061b5014311108b4abdc8
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/7700359
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

infra/config/generated/luci/cr-buildbucket.cfg

diff --git a/infra/config/generated/luci/cr-buildbucket.cfg b/infra/config/generated/luci/cr-buildbucket.cfg
index c670e30..5dd1889 100644
--- a/infra/config/generated/luci/cr-buildbucket.cfg
+++ b/infra/config/generated/luci/cr-buildbucket.cfg
@@ -2275,7 +2275,7 @@
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "builderless:1"
       dimensions: "cpu:arm64"
-      dimensions: "os:Mac-15"
+      dimensions: "os:Mac-15|Mac-26"
       dimensions: "pool:luci.chromium.gpu.ci"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -2977,7 +2977,7 @@
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "builderless:1"
       dimensions: "cpu:arm64"
-      dimensions: "os:Mac-15"
+      dimensions: "os:Mac-15|Mac-26"
       dimensions: "pool:luci.chromium.gpu.ci"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -6923,7 +6923,7 @@
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "builderless:1"
       dimensions: "cpu:arm64"
-      dimensions: "os:Mac-15"
+      dimensions: "os:Mac-15|Mac-26"
       dimensions: "pool:luci.chromium.gpu.try"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -7094,7 +7094,7 @@
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "builderless:1"
       dimensions: "cpu:arm64"
-      dimensions: "os:Mac-15"
+      dimensions: "os:Mac-15|Mac-26"
       dimensions: "pool:luci.chromium.gpu.try"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -8527,7 +8527,7 @@
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "builderless:1"
       dimensions: "cpu:arm64"
-      dimensions: "os:Mac-15"
+      dimensions: "os:Mac-15|Mac-26"
       dimensions: "pool:luci.chromium.gpu.try"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -8693,7 +8693,7 @@
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "builderless:1"
       dimensions: "cpu:arm64"
-      dimensions: "os:Mac-15"
+      dimensions: "os:Mac-15|Mac-26"
       dimensions: "pool:luci.chromium.gpu.try"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -8859,7 +8859,7 @@
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "builderless:1"
       dimensions: "cpu:arm64"
-      dimensions: "os:Mac-15"
+      dimensions: "os:Mac-15|Mac-26"
       dimensions: "pool:luci.chromium.gpu.try"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -9025,7 +9025,7 @@
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "builderless:1"
       dimensions: "cpu:arm64"
-      dimensions: "os:Mac-15"
+      dimensions: "os:Mac-15|Mac-26"
       dimensions: "pool:luci.chromium.gpu.try"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -9191,7 +9191,7 @@
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "builderless:1"
       dimensions: "cpu:arm64"
-      dimensions: "os:Mac-15"
+      dimensions: "os:Mac-15|Mac-26"
       dimensions: "pool:luci.chromium.gpu.try"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -9357,7 +9357,7 @@
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "builderless:1"
       dimensions: "cpu:arm64"
-      dimensions: "os:Mac-15"
+      dimensions: "os:Mac-15|Mac-26"
       dimensions: "pool:luci.chromium.gpu.try"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"

infra/config/main.star

diff --git a/infra/config/main.star b/infra/config/main.star
index 3b0aafb..9094a66 100755
--- a/infra/config/main.star
+++ b/infra/config/main.star
@@ -119,7 +119,7 @@
 chromium_luci.configure_builders(
     os_dimension_overrides = {
         os.LINUX_DEFAULT: os.LINUX_JAMMY,
-        os.MAC_DEFAULT: os.MAC_15,
+        os.MAC_DEFAULT: "Mac-15|Mac-26",
         os.WINDOWS_DEFAULT: os.WINDOWS_10,
     },
 )