export allowlist of environment variables to Bazel

Previously, Bazel was invoked during mixed builds with a stripped down
environment. This CL adds an allowlist of environment variables that are
passed to Bazel.

Test: WITH_TIDY=1 DISABLE_ARTIFACT_PATH_REQUIREMENTS=true mss tidy-packages-modules-NeuralNetworks --bazel-mode-dev
Change-Id: I23147bec59f6522953cf623e7bcaa0f1f99a75a3
diff --git a/bp2build/conversion_test.go b/bp2build/conversion_test.go
index b9c06bc..8c24093 100644
--- a/bp2build/conversion_test.go
+++ b/bp2build/conversion_test.go
@@ -153,6 +153,14 @@
 		},
 		{
 			dir:      "allowlists",
+			basename: GeneratedBuildFileName,
+		},
+		{
+			dir:      "allowlists",
+			basename: "env.bzl",
+		},
+		{
+			dir:      "allowlists",
 			basename: "mixed_build_prod_allowlist.txt",
 		},
 		{