[mlir][vector] Specify bounds of dynamic indices in vector.extract/in…

…sert (llvm#95933)

mlir/include/mlir/Dialect/Vector/IR/VectorOps.td

@@ -680,6 +680,10 @@ def Vector_ExtractOp :
     Takes an n-D vector and a k-D position and extracts the (n-k)-D vector at
     the proper position. Degenerates to an element type if n-k is zero.
 
+    Dynamic indices must be greater or equal to zero and less than the size of
+    the corresponding dimension. The result is undefined if any index is
+    out-of-bounds.
+
     Example:
 
     ```mlir
@@ -862,6 +866,10 @@ def Vector_InsertOp :
     and inserts the n-D source into the (n+k)-D destination at the proper
     position. Degenerates to a scalar or a 0-d vector source type when n = 0.
 
+    Dynamic indices must be greater or equal to zero and less than the size of
+    the corresponding dimension. The result is undefined if any index is
+    out-of-bounds.
+
     Example:
 
     ```mlir