Update installer wxi file for new KeyVault WebKey library

[markcowl]

Comments

Update wix installer with new KeyVault dependency

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Overall Changes

• MANDATORY - General changes

General

• Title of the PR is clear and informative
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• All files have the Microsoft copyright header
• The PR does not introduce breaking changes (unless a major version change occurs in the assembly and module)

[markcowl]

@azuresdkci add to whitelist

[markcowl]

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