message: smoke: enable chunk size 0x200000 test case
  We have fixed the chunk size related bug in `nydus-image merge`,
  so just enable the test case in smoke.
diff: @@ -114,8 +114,7 @@ func testNativeLayer(t *testing.T, ctx tool.Context) {
  params.
  Register(paramCompressor, []interface{}{"zstd", "none", "lz4_block"}).
  Register(paramFSVersion, []interface{}{"5", "6"}).
  - // FIXME: specify chunk size `0x200000` case.
  - Register(paramChunkSize, []interface{}{"0x100000"}).
  + Register(paramChunkSize, []interface{}{"0x100000", "0x200000"}).
  Register(paramCacheType, []interface{}{"blobcache", ""}).
  Register(paramCacheCompressed, []interface{}{true, false}).
  Register(paramRafsMode, []interface{}{"direct", "cached"}).
  