Go: Fix Timeout Casting in time.Duration

[edlng]

time.Duration has the duration in nanoseconds. We need to ensure our casting is proper and valid to prevent any undefined behavior from occurring.

Issue link

This Pull Request is linked to issue (URL): closes #3931

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• This Pull Request is related to one issue.
• Commit message has a detailed description of what changed and why.
• Tests are added or updated.
• CHANGELOG.md and documentation files are updated.
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• Create merge commit if merging release branch into main, squash otherwise.

[edlng]

@jbrinkman I decided to do the casting work in WithRequestTimeout and WithConnectionTimeout instead since I think it allows for simpler code. I've redefined the config types to be uint32 so it can be passed directly into the protobuf request. Let me know your thoughts on these changes disregard this comment. I've changed it back after addressing the comments