Pelican --version prints to stderr instead of stdout

[haoming29]

Pelican Version:
Run ./pelican --version to get version number.

Pelican Service:

• Client
• Plugin
• Registry
• Director
• Origin
• Cache
• Other (please give the detail)

Describe the bug
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As reported by @matyasselmeci, Pelican --version was printed out stdout, but currently it prints to stderr

To Reproduce
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Expected behavior
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Screenshots
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Desktop (please complete the following information):

• OS: [e.g. Linux, MacOS]
• Browser: [e.g. chrome, safari, if the bug relates to any web user interface]

Additional context
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