[mlir] NFC: move AffineOps tests from test/ to test/Dialect

AffineOps dialect lives under lib/Dialect/AffineOps and so should its
tests.

diff --git a/mlir/test/AffineOps/canonicalize.mlir b/mlir/test/Dialect/AffineOps/canonicalize.mlir
similarity index 100%
rename from mlir/test/AffineOps/canonicalize.mlir
rename to mlir/test/Dialect/AffineOps/canonicalize.mlir

diff --git a/mlir/test/AffineOps/dma.mlir b/mlir/test/Dialect/AffineOps/dma.mlir
similarity index 100%
rename from mlir/test/AffineOps/dma.mlir
rename to mlir/test/Dialect/AffineOps/dma.mlir

diff --git a/mlir/test/AffineOps/inlining.mlir b/mlir/test/Dialect/AffineOps/inlining.mlir
similarity index 100%
rename from mlir/test/AffineOps/inlining.mlir
rename to mlir/test/Dialect/AffineOps/inlining.mlir

diff --git a/mlir/test/AffineOps/invalid.mlir b/mlir/test/Dialect/AffineOps/invalid.mlir
similarity index 100%
rename from mlir/test/AffineOps/invalid.mlir
rename to mlir/test/Dialect/AffineOps/invalid.mlir

diff --git a/mlir/test/AffineOps/load-store-invalid.mlir b/mlir/test/Dialect/AffineOps/load-store-invalid.mlir
similarity index 100%
rename from mlir/test/AffineOps/load-store-invalid.mlir
rename to mlir/test/Dialect/AffineOps/load-store-invalid.mlir

diff --git a/mlir/test/AffineOps/load-store.mlir b/mlir/test/Dialect/AffineOps/load-store.mlir
similarity index 100%
rename from mlir/test/AffineOps/load-store.mlir
rename to mlir/test/Dialect/AffineOps/load-store.mlir

diff --git a/mlir/test/AffineOps/memref-stride-calculation.mlir b/mlir/test/Dialect/AffineOps/memref-stride-calculation.mlir
similarity index 100%
rename from mlir/test/AffineOps/memref-stride-calculation.mlir
rename to mlir/test/Dialect/AffineOps/memref-stride-calculation.mlir

diff --git a/mlir/test/AffineOps/ops.mlir b/mlir/test/Dialect/AffineOps/ops.mlir
similarity index 100%
rename from mlir/test/AffineOps/ops.mlir
rename to mlir/test/Dialect/AffineOps/ops.mlir