[serialization_lib] Align to Tosa Spec

removed attributes for Reshape, Slice and Tile Ops
renamed field accum_dtype to acc_type,
renamed then_branch/else_branch to then_graph/else_graph
renamed cond_branch/body_branch to cond_graph/body_graph

Signed-off-by: Tai Ly <tai.ly@arm.com>
Change-Id: I2001f19519987d9e64c18b1f11762f9d3b9be4ec
diff --git a/schema/tosa.fbs b/schema/tosa.fbs
index e37c89a..2bb3470 100644
--- a/schema/tosa.fbs
+++ b/schema/tosa.fbs
@@ -137,9 +137,6 @@
   TransposeConvAttribute,
   PadAttribute,
   AxisAttribute,
-  ReshapeAttribute,
-  SliceAttribute,
-  TileAttribute,
   ResizeAttribute,
   ClampAttribute,
   RescaleAttribute,
@@ -163,7 +160,7 @@
   stride: [int32];
   input_zp: int32;
   output_zp: int32;
-  accum_dtype: DType;
+  acc_type: DType;
 }
 
 table ConvAttribute {
@@ -194,19 +191,6 @@
   axis: int32;
 }
 
-table ReshapeAttribute {
-  new_shape: [int32];
-}
-
-table SliceAttribute {
-  start: [int32];
-  size: [int32];
-}
-
-table TileAttribute {
-  multiples: [int32];
-}
-
 table ResizeAttribute {
   scale: [int16];
   offset: [int16];
@@ -242,13 +226,13 @@
 }
 
 table CondIfAttribute {
-  then_branch: string;
-  else_branch: string;
+  then_graph: string;
+  else_graph: string;
 }
 
 table WhileLoopAttribute {
-  cond_branch: string;
-  body_branch: string;
+  cond_graph: string;
+  body_graph: string;
 }
 
 table TransposeAttribute {