fix(2.x): alias COPY_EXECUTION_REQUIREMENTS to bazel_lib

Author: jbedard

lib/private/copy_common.bzl

@@ -1,14 +1,9 @@
 "Helpers for copy rules"
 
+load(
+    "@bazel_lib//lib/private:copy_common.bzl",
+    _COPY_EXECUTION_REQUIREMENTS = "COPY_EXECUTION_REQUIREMENTS",
+)
+
 # Hints for Bazel spawn strategy
-COPY_EXECUTION_REQUIREMENTS = {
-    # ----------------+-----------------------------------------------------------------------------
-    # no-sandbox      | Results in the action or test never being sandboxed; it can still be cached
-    #                 | or run remotely.
-    # ----------------+-----------------------------------------------------------------------------
-    # See https://bazel.google.cn/reference/be/common-definitions?hl=en&authuser=0#common-attributes
-    #
-    # Sandboxing for this action is wasteful since there is a 1:1 mapping of input file/directory to
-    # output file/directory so little room for non-hermetic inputs to sneak in to the execution.
-    "no-sandbox": "1",
-}
+COPY_EXECUTION_REQUIREMENTS = _COPY_EXECUTION_REQUIREMENTS