Add BUILD files for test/.../build/lib{buildeventstream,skylark/...,util/...,windows/..., and others}

Also enable a number of tests that were not previously running on windows, but
that work just fine when enabled.

RELNOTES: None.
PiperOrigin-RevId: 302085725
diff --git a/src/test/java/com/google/devtools/build/lib/rules/BUILD b/src/test/java/com/google/devtools/build/lib/rules/BUILD
index 1625dbf..ce0911e 100644
--- a/src/test/java/com/google/devtools/build/lib/rules/BUILD
+++ b/src/test/java/com/google/devtools/build/lib/rules/BUILD
@@ -23,6 +23,7 @@
         "//src/test/java/com/google/devtools/build/lib/rules/repository:srcs",
         "//src/test/java/com/google/devtools/build/lib/rules/test:srcs",
     ],
+    visibility = ["//src:__subpackages__"],
 )
 
 java_test(