Add `$setOnInsert` operator to `Parse.Server.database.update`

[mtrezza]

New Feature / Enhancement Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.

Current Limitation

When using the Parse Server DB adapter directly (as exposed in Cloud Code via Parse.Server.database) the operator $setOnInsert is not supported for upsert operations via Parse Server's upsertOneObject.

Feature / Enhancement Description

Add support for $setOnInsert.

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[parseplatformorg]

🎉 This change has been released in version 6.4.0-alpha.7

[parseplatformorg]

🎉 This change has been released in version 5.6.0

[parseplatformorg]

🎉 This change has been released in version 6.5.0-beta.1

[parseplatformorg]

🎉 This change has been released in version 6.5.0-alpha.1

[parseplatformorg]

🎉 This change has been released in version 6.5.0