Add --incompatible_disable_expand_if_all_available_in_flag_set

Corresponding issue: https://github.com/bazelbuild/bazel/issues/7008

RELNOTES: None.
PiperOrigin-RevId: 227522028
diff --git a/third_party/com/github/bazelbuild/bazel/src/main/protobuf/crosstool_config.proto b/third_party/com/github/bazelbuild/bazel/src/main/protobuf/crosstool_config.proto
index 9aa059f..b79e5d2 100644
--- a/third_party/com/github/bazelbuild/bazel/src/main/protobuf/crosstool_config.proto
+++ b/third_party/com/github/bazelbuild/bazel/src/main/protobuf/crosstool_config.proto
@@ -148,6 +148,9 @@
     // unconditionally for every action specified.
     repeated WithFeatureSet with_feature = 3;
 
+    // Deprecated (https://github.com/bazelbuild/bazel/issues/7008) - use
+    // expand_if_all_available in flag_group
+    //
     // A list of build variables that this feature set needs, but which are
     // allowed to not be set. If any of the build variables listed is not
     // set, the feature set will not be expanded.