Fix googleapis and remoteapis sources in bootstrap distfile

Previously, their sources are included as external repos and mapped to third_party,
after this change, their sources are directly included under the third_party directory.

This change is needed because a54a393 broke the mapping mechanism which depends on the canonical repository name.

Fixes //src/test/shell/bazel:bazel_bootstrap_distfile_tar_test with Bazel@HEAD and Bazel@7.1 https://buildkite.com/bazel/bazel-at-head-plus-downstream/builds/3657#018da594-e743-44da-8f76-782a8e5c86b1

Related #21292

PiperOrigin-RevId: 606960533
Change-Id: Ia4a81d5730e04964bc06c8f8ee2685364ce8623b

BUILD

@@ -164,9 +164,6 @@ pkg_tar(
     remap_paths = {
         "MODULE.bazel.lock.dist": "MODULE.bazel.lock",
         "WORKSPACE.bzlmod.filtered": "WORKSPACE.bzlmod",
-        # Rewrite paths coming from local repositories back into third_party.
-        "external/googleapis~override": "third_party/googleapis",
-        "external/remoteapis~override": "third_party/remoteapis",
     },
     strip_prefix = ".",
     # Public but bazel-only visibility.

third_party/BUILD

@@ -12,6 +12,7 @@ filegroup(
         "//third_party/android_dex:srcs",
         "//third_party/cncf_udpa:srcs",
         "//third_party/def_parser:srcs",
+        "//third_party/googleapis:srcs",
         "//third_party/grpc:srcs",
         "//third_party/grpc-java:srcs",
         "//third_party/ijar:srcs",
@@ -33,9 +34,8 @@ filegroup(
         "//third_party/py/frozendict:srcs",
         "//third_party/py/mock:srcs",
         "//third_party/py/six:srcs",
+        "//third_party/remoteapis:srcs",
         "//third_party/zlib:srcs",
-        "@googleapis//:srcs",
-        "@remoteapis//:srcs",
     ],
 )