refactor: migrate BUILD files to explicit rules_cc imports

Add explicit load statements for cc_binary, cc_library, and cc_test
from @rules_cc//cc:defs.bzl in:
- shared/cpp/BUILD.bazel
- swift/logging/BUILD.bazel
- misc/bazel/internal/zipmerge/BUILD.bazel

shared/cpp/BUILD.bazel

@@ -1,3 +1,5 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
 cc_library(
     name = "extractor_shared",
     srcs = glob(["*.cpp"]),