Add new workaround target due to bazelbuild/bazel#21519

Previously, the only failure case was XLA depending on TSL header accessed via `filegroup` or `exports_files`. The new target stops the reverse where TSL depends on XLA. We can delete this post TSL move.

PiperOrigin-RevId: 696991269

third_party/tsl/BUILD.bazel

@@ -12,3 +12,15 @@ license(
     package_name = "tsl",
     license_kinds = ["@rules_license//licenses/spdx:Apache-2.0"],
 )
+
+cc_library(
+    name = "empty",
+    visibility = ["//visibility:public"],
+)
+
+# Needed to workaround https://github.com/bazelbuild/bazel/issues/21519
+alias(
+    name = "bazel_issue_21519",
+    actual = ":empty",
+    visibility = ["//visibility:public"],
+)

third_party/tsl/tsl/platform/default/rules_cc.bzl

@@ -26,5 +26,6 @@ def cc_library(name, deps = None, **kwargs):
     # alias of `empty`.
     if name != "empty":
         deps = deps + ["@xla//xla/tsl:bazel_issue_21519"]  # buildifier: disable=list-append
+        deps = deps + ["@tsl//:bazel_issue_21519"]  # buildifier: disable=list-append
 
     native.cc_library(name = name, deps = deps, **kwargs)