Re-enable GPU object lifetime management tests and leak device tests for

Vulkan.

test/correctness/gpu_object_lifetime_1.cpp

@@ -19,11 +19,6 @@ int main(int argc, char *argv[]) {
 
     Target target = get_jit_target_from_environment();
 
-    if (target.has_feature(Target::Vulkan)) {
-        printf("[SKIP] Skipping test for Vulkan. Driver issues are preventing proper cleanup for shutdown.\n");
-        return 0;
-    }
-
     // We need to hook the default handler too, to catch the frees done by release_all
     JITHandlers handlers;
     handlers.custom_print = halide_print;

test/correctness/gpu_object_lifetime_2.cpp

@@ -18,11 +18,6 @@ int main(int argc, char *argv[]) {
 
     Target target = get_jit_target_from_environment();
 
-    if (target.has_feature(Target::Vulkan)) {
-        printf("[SKIP] Skipping test for Vulkan. Driver issues are preventing proper cleanup for shutdown.\n");
-        return 0;
-    }
-
     // We need to hook the default handler too, to catch the frees done by release_all
     JITHandlers handlers;
     handlers.custom_print = halide_print;

test/correctness/gpu_object_lifetime_3.cpp

@@ -18,11 +18,6 @@ int main(int argc, char *argv[]) {
 
     Target target = get_jit_target_from_environment();
 
-    if (target.has_feature(Target::Vulkan)) {
-        printf("[SKIP] Skipping test for Vulkan. Driver issues are preventing proper cleanup for shutdown.\n");
-        return 0;
-    }
-
     // We need to hook the default handler too, to catch the frees done by release_all
     JITHandlers handlers;
     handlers.custom_print = halide_print;

test/correctness/leak_device_memory.cpp

@@ -21,11 +21,6 @@ int main(int argc, char **argv) {
 
     Target target = get_jit_target_from_environment();
 
-    if (target.has_feature(Target::Vulkan)) {
-        printf("[SKIP] Skipping test for Vulkan. Driver issues are preventing proper cleanup for shutdown.\n");
-        return 0;
-    }
-
     // We need debug output to record object creation.
     target.set_feature(Target::Debug);