Enable floor test on vulkan-spirv and llvm-ir (#3134)

Also sort vulkan tests alphabetically.

Fixes https://github.com/google/iree/issues/1696
diff --git a/iree/test/e2e/xla_ops/BUILD b/iree/test/e2e/xla_ops/BUILD
index 66a9fcf..fbcd1d2 100644
--- a/iree/test/e2e/xla_ops/BUILD
+++ b/iree/test/e2e/xla_ops/BUILD
@@ -40,23 +40,20 @@
         "abs.mlir",
         "add.mlir",
         "batch_norm_inference.mlir",
-        "broadcast_add.mlir",
         "broadcast.mlir",
+        "broadcast_add.mlir",
         "broadcast_in_dim.mlir",
         "clamp.mlir",
         "compare.mlir",
-        "convolution.mlir",
-        "convert.mlir",
         "concatenate.mlir",
         "constant.mlir",
+        "convert.mlir",
+        "convolution.mlir",
         "cosine.mlir",
         "divide.mlir",
         "dot.mlir",
         "exponential.mlir",
-
-        # TODO(#1696): Enable after standard dialect can support floor
-        # operation. Lowering from XLA -> linalg should be easy fix.
-        # "floor.mlir",
+        "floor.mlir",
         "gather.mlir",
         "gather_concat.mlir",
         "iota.mlir",
@@ -107,6 +104,7 @@
         "divide.mlir",
         "dot.mlir",
         "exponential.mlir",
+        "floor.mlir",
         "gather.mlir",
         "gather_concat.mlir",
         "iota.mlir",
diff --git a/iree/test/e2e/xla_ops/CMakeLists.txt b/iree/test/e2e/xla_ops/CMakeLists.txt
index 0303432..c44290a 100644
--- a/iree/test/e2e/xla_ops/CMakeLists.txt
+++ b/iree/test/e2e/xla_ops/CMakeLists.txt
@@ -46,6 +46,7 @@
     "divide.mlir"
     "dot.mlir"
     "exponential.mlir"
+    "floor.mlir"
     "gather.mlir"
     "gather_concat.mlir"
     "iota.mlir"
@@ -96,6 +97,7 @@
     "divide.mlir"
     "dot.mlir"
     "exponential.mlir"
+    "floor.mlir"
     "gather.mlir"
     "gather_concat.mlir"
     "iota.mlir"