[VITISAI] node arg can be used more than once (#17068)
### Description
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a node arg can be matched multiple times.
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->
Previous, we thought the node name must be unique and thus can be used
as identifier. However, we recently found that a node's name can be
empty thus failed to identify which node is which. So, we use node arg
to differentiate the node. To do so, we need to match node arg more than
once.
