Updates the Root Signature metadata parser to extract version
information. This requirement was added after the initial parser
implementation.
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Co-authored-by: joaosaffran <joao.saffran@microsoft.com>
This PR adds a few more tests to validate some error scenarios of root
signature metadata representation.
Closes: https://github.com/llvm/llvm-project/issues/127280
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Co-authored-by: joaosaffran <joao.saffran@microsoft.com>