Laravel 10 support

[sloan58]

Description

Update to mongodb/laravel-mongodb for Laravel 10 support. Refactor Models and Tests.

Motivation and context

Provide package support for Laravel 10

If it fixes an open issue, please link to the issue here (if you write fixes #num or closes #num, the issue will be automatically closed when the pull is accepted.)

How has this been tested?

All included tests are passing in dev

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• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause existing functionality to change)

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[sloan58]

Tests failed with:

Problem 1
    - mongodb/laravel-mongodb[4.1.0, ..., 4.1.1] require ext-mongodb ^1.15 -> it is missing from your system. Install or enable PHP's mongodb extension.

Do we need to bump the ext-mongodb version for the automated testing env? I'm not sure if/how I can do that.