Use HashingUtils in config hashCode

[dougqh]

What Does This Do

Replaces Objects.hash(...) usage in ParsedConfigKey and ConfigSetting with HashingUtils-based hashing.

Motivation

Avoid varargs-based Objects.hash and auto-boxing in these classes

Additional Notes

Contributor Checklist

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  Use solves instead, and assign the PR milestone to the issue
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• Update public documentation with any new configuration flags or behaviors

Jira ticket: [PROJ-IDENT]

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[datadog-datadog-prod-us1]

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Bits Dev status: ✅ Done

CI Auto-fix: Disabled | Enable

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[datadog-prod-us1-6]

I can only run on private repositories.

[dougqh]

Looks like HashingUtils may not be visible to config-utils, will revisit later on

[dougqh]

Need to relocate HashingUtils before making this change