Bazel: Drop the .bazel suffix from build files

Rationale: Bazel docs all consistently use `BUILD` instead of `BUILD.bazel`.
PiperOrigin-RevId: 623803750
Change-Id: Ic8c99f2ce4c932f5025b17d8028aad5b920e3200

.bazelrc

@@ -1,3 +1,5 @@
+# Migration to Bzlmod is not ready yet, waiting for Protobuf to release 27.0
+common --noenable_bzlmod
+
 # Build in C++17 mode without a custom CROSSTOOL
 build --cxxopt=-std=c++17 --host_cxxopt=-std=c++17
-common --noenable_bzlmod

sandboxed_api/examples/hello_sapi/.bazelrc

@@ -1,2 +1,5 @@
+# Migration to Bzlmod is not ready yet, waiting for Protobuf to release 27.0
+common --noenable_bzlmod
+
 # Build in C++17 mode without a custom CROSSTOOL
-build --cxxopt=-std=c++17
+build --cxxopt=-std=c++17 --host_cxxopt=-std=c++17