Fix 8-bit storage nearly always using the

UniformAndStorageBuffer8BitAccess capability.

When using the 8-bit storage extension it basically always used the
`UniformAndStorageBuffer8BitAccess` capability, even in cases where it
wasn't required. For instance if we are targeting Vulkan 1.1 (SPIR-V 1.3
or higher), and we are only using 8-bit types in an SSBO, we only need
the `StorageBuffer8BitAccess` capability.

I fixed this by enabling storage buffer use in Vulkan 1.1 / SPIR-V 1.3
or higher, and then changing the logic to match.

I also added some tests that will output different capabilities when run
on Vulkan 1.0 and 1.1, thus they are added twice to the test list (one
for each version).

Fixes #1539

gtests/Spv.FromFile.cpp

@@ -241,6 +241,8 @@ INSTANTIATE_TEST_CASE_P(
         "spv.8bitstorage_Error-int.frag",
         "spv.8bitstorage-uint.frag",
         "spv.8bitstorage_Error-uint.frag",
+        "spv.8bitstorage-ubo.vert",
+        "spv.8bitstorage-ssbo.vert",
         "spv.accessChain.frag",
         "spv.aggOps.frag",
         "spv.always-discard.frag",
@@ -365,6 +367,8 @@ INSTANTIATE_TEST_CASE_P(
 INSTANTIATE_TEST_CASE_P(
     Glsl, CompileVulkan1_1ToSpirvTest,
     ::testing::ValuesIn(std::vector<std::string>({
+        "spv.1.3.8bitstorage-ubo.vert",
+        "spv.1.3.8bitstorage-ssbo.vert",
         "spv.deviceGroup.frag",
         "spv.drawParams.vert",
         "spv.int8.frag",