Export RunBp2BuildTestCaseSimple() in testing.go

This is to support the migration of conversion tests to be next
to the files they're testing

Bug: 242070498
Test: m bp2build
Change-Id: I66243d420743273e7ebad70886cfe690740182c4
diff --git a/bp2build/cc_prebuilt_library_static_test.go b/bp2build/cc_prebuilt_library_static_test.go
index 7c224f1..69a1b5e 100644
--- a/bp2build/cc_prebuilt_library_static_test.go
+++ b/bp2build/cc_prebuilt_library_static_test.go
@@ -21,7 +21,7 @@
 )
 
 func TestStaticPrebuiltLibrary(t *testing.T) {
-	runBp2BuildTestCaseSimple(t,
+	RunBp2BuildTestCaseSimple(t,
 		Bp2buildTestCase{
 			Description:                "prebuilt library static simple",
 			ModuleTypeUnderTest:        "cc_prebuilt_library_static",
@@ -44,7 +44,7 @@
 }
 
 func TestStaticPrebuiltLibraryWithArchVariance(t *testing.T) {
-	runBp2BuildTestCaseSimple(t,
+	RunBp2BuildTestCaseSimple(t,
 		Bp2buildTestCase{
 			Description:                "prebuilt library static with arch variance",
 			ModuleTypeUnderTest:        "cc_prebuilt_library_static",
@@ -75,7 +75,7 @@
 }
 
 func TestStaticPrebuiltLibraryStaticStanzaFails(t *testing.T) {
-	runBp2BuildTestCaseSimple(t,
+	RunBp2BuildTestCaseSimple(t,
 		Bp2buildTestCase{
 			Description:                "prebuilt library with static stanza fails because multiple sources",
 			ModuleTypeUnderTest:        "cc_prebuilt_library_static",