feat: validate JSON configuration before generating build

[ghost]

Adds UCC config validation against a predefined JSON schema.

Reason: improve developer experience while creating add on for Splunk. This change should avoid unnecessary builds if config is not correct. For example, error when specifying too long label currently is only visible after installing a TA in Splunk which takes time. This change makes it visible immediately.

Other improvements to consider in the future:

• fail validation if an input contains unsupported option (i.e. "blackList", which was changed to "denyList")
• test case for correct and incorrect configurations

cc: @ricardom-splunk

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[github-actions]

Expected release notes (by @arys-splunk)

features:
validate JSON configuration before generating build (ab2e1ba)

others (will not be included in Semantic-Release notes):
d4993e9 updated to use schma.product rather than schema.namespace (#166)

• I hereby acknowledge these release notes are 🥙 AWESOME 🥙

[ghost]

I have read the CLA Document and I hereby sign the CLA

[ryanfaircloth]

🎉 This PR is included in version 4.4.0 🎉

The release is available on GitHub release

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