Update bcr presubmit for more tests on 7.x+ (#306)

Something about --incompatible_enable_cc_toolchain_resolution with 6.x
makes it so we can't run all our tests on the bcr presubmit. This splits
6.x out so we can run them all for newer bazel versions.

.bcr/presubmit.yml

@@ -1,18 +1,17 @@
 matrix:
-  platform: ["macos_arm64", "ubuntu2004"]
-  bazel: ["6.x", "7.x", "rolling"]
+  bazel: ["7.x", "rolling"]
 
 tasks:
   verify_targets:
     name: "Build targets under //lib"
-    platform: ${{ platform }}
+    platform: ubuntu2004
     bazel: ${{ bazel }}
     build_targets:
     - '@apple_support//lib/...'
-  run_tests:
+  run_tests_6.x:
     name: "Run test targets"
     platform: "macos_arm64"
-    bazel: ${{ bazel }}
+    bazel: 6.x
     build_targets:
     - '@apple_support//lib/...'
     test_targets:
@@ -22,6 +21,20 @@ tasks:
     - '-@apple_support//test:linking_disable_objc_apple_link_test'
     - '-@apple_support//test:linking_dead_strip_requested_test'
     - '-@apple_support//test:linking_opt_link_test'
+    - '-@apple_support//test:binary_watchos_device_arm64e_test'
+    - '-@apple_support//test:binary_watchos_device_arm64_test'
+    # Needs visionOS SDK
+    - '-@apple_support//test:binary_visionos_arm64_simulator_test'
+    - '-@apple_support//test:binary_visionos_device_test'
+  run_tests:
+    name: "Run test targets"
+    platform: "macos_arm64"
+    bazel: ${{ bazel }}
+    build_targets:
+    - '@apple_support//lib/...'
+    test_targets:
+    - '@apple_support//test/...'
+    - '--'
     # Needs visionOS SDK
     - '-@apple_support//test:binary_visionos_arm64_simulator_test'
     - '-@apple_support//test:binary_visionos_device_test'