Ignore all whitespace lint messages for cpplint (#22781)

### Description

Ignore all whitespace lint messages for cpplint. Remove redundant
configs in dml/.

### Motivation and Context

They are handled automatically by clang-format and creates too much
noise in the PR files tab.

CPPLINT.cfg

@@ -0,0 +1 @@
+filter=-whitespace

onnxruntime/core/providers/dml/CPPLINT.cfg

@@ -1 +0,0 @@
-filter=-whitespace/braces,-whitespace/parens,-whitespace/line_length,-whitespace/indent,-whitespace/newline

onnxruntime/core/providers/dml/DmlExecutionProvider/src/External/CPPLINT.cfg

@@ -1 +1 @@
-filter=-whitespace/comments,-readability/todo,-whitespace/end_of_line,-runtime/indentation_namespace
+filter=-readability/todo