Makes rdiv consistent with div (#45407)

Summary:
In addition to making rdiv consistent with div, this PR significantly expands division testing, accounting for floor_divide actually performing truncation division, too.

Pull Request resolved: #45407

Reviewed By: ngimel

Differential Revision: D23974967

Pulled By: mruberry

fbshipit-source-id: 82b46b07615603f161ab7cd1d3afaa6d886bfe95

test/onnx/expect/TestOperators.test_view_flatten.expect

@@ -65,60 +65,40 @@ graph {
     }
   }
   node {
-    input: "6"
     output: "7"
-    name: "Cast_6"
-    op_type: "Cast"
-    attribute {
-      name: "to"
-      i: 11
-      type: INT
-    }
-  }
-  node {
-    output: "8"
-    name: "Constant_7"
+    name: "Constant_6"
     op_type: "Constant"
     attribute {
       name: "value"
       t {
-        data_type: 11
-        raw_data: "\000\000\000\000\000\000\360?"
+        data_type: 7
+        raw_data: "\030\000\000\000\000\000\000\000"
       }
       type: TENSOR
     }
   }
   node {
-    input: "8"
     input: "7"
-    output: "9"
-    name: "Div_8"
+    input: "6"
+    output: "8"
+    name: "Div_7"
     op_type: "Div"
   }
   node {
-    output: "10"
-    name: "Constant_9"
-    op_type: "Constant"
+    input: "8"
+    output: "9"
+    name: "Cast_8"
+    op_type: "Cast"
     attribute {
-      name: "value"
-      t {
-        data_type: 11
-        raw_data: "\000\000\000\000\000\0008@"
-      }
-      type: TENSOR
+      name: "to"
+      i: 7
+      type: INT
     }
   }
   node {
     input: "9"
-    input: "10"
-    output: "11"
-    name: "Mul_10"
-    op_type: "Mul"
-  }
-  node {
-    input: "11"
-    output: "12"
-    name: "Cast_11"
+    output: "10"
+    name: "Cast_9"
     op_type: "Cast"
     attribute {
       name: "to"
@@ -128,8 +108,8 @@ graph {
   }
   node {
     input: "3"
-    output: "13"
-    name: "Unsqueeze_12"
+    output: "11"
+    name: "Unsqueeze_10"
     op_type: "Unsqueeze"
     attribute {
       name: "axes"
@@ -138,9 +118,9 @@ graph {
     }
   }
   node {
-    input: "12"
-    output: "14"
-    name: "Unsqueeze_13"
+    input: "10"
+    output: "12"
+    name: "Unsqueeze_11"
     op_type: "Unsqueeze"
     attribute {
       name: "axes"
@@ -149,10 +129,10 @@ graph {
     }
   }
   node {
-    input: "13"
-    input: "14"
-    output: "15"
-    name: "Concat_14"
+    input: "11"
+    input: "12"
+    output: "13"
+    name: "Concat_12"
     op_type: "Concat"
     attribute {
       name: "axis"
@@ -162,9 +142,9 @@ graph {
   }
   node {
     input: "0"
-    input: "15"
-    output: "16"
-    name: "Reshape_15"
+    input: "13"
+    output: "14"
+    name: "Reshape_13"
     op_type: "Reshape"
   }
   name: "torch-jit-export"
@@ -191,7 +171,7 @@ graph {
     }
   }
   output {
-    name: "16"
+    name: "14"
     type {
       tensor_type {
         elem_type: 1