[bazel] Clean up bazel scripts (#7984)

wpiunits/BUILD.bazel

@@ -9,8 +9,10 @@ py_binary(
     name = "generate_units",
     srcs = ["generate_units.py"],
     data = glob(["src/generate/main/java/**"]),
-    tags = ["manual"],
-    visibility = ["//visibility:public"],
+    target_compatible_with = select({
+        "@rules_bzlmodrio_toolchains//constraints/is_systemcore:systemcore": ["@platforms//:incompatible"],
+        "//conditions:default": [],
+    }),
     deps = [requirement("jinja2")],
 )