feat(tinylicious): Support command line --port argument

[Josmithr]

Adds a --port argument to the tinylicious command. Previously, the only way to configure the port tinylicious used was via an environment variable. Now, a command line argument is supported as well (and takes precedence over the environment variable when both are set).

This is part of a multi-PR effort to allow our repo's tinylicious real service tests to get port assignments dynamically.

This library update needs to be published before the changes can be used in the client packages for their tinylicious tests. But the whole story can be previewed here: #27701.

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[github-actions]

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Base commit: e1dcf16db76b2c217bf3bd9e5de80eabc8e68ce8
Head commit: 86122a4035a6cae263c09924336568cff2e3acc3

Pending — Build - client packages is running. Results will appear here when the build completes.

[github-actions]

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