[MAINTENANCE] Introduce NumericRangeEstimator class hierarchy and encapsulate existing estimator implementations

[alexsherstinsky]

Scope

Having type objects the implement the estimator functionality is a useful encapsulation for code interpretability and maintenance. It introduces separation of concerns between the NumericMetricRangeMultiBatchParameterBuilder building block and different deterministic and statistical estimators that can be utilized inside it and can be introduced by any contributor easily.

Please annotate your PR title to describe what the PR does, then give a brief bulleted description of your PR below. PR titles should begin with [BUGFIX], [FEATURE], [DOCS], or [MAINTENANCE]. If a new feature introduces breaking changes for the Great Expectations API or configuration files, please also add [BREAKING]. You can read about the tags in our contributor checklist.

Changes proposed in this pull request:

• JIRA: GREAT-761/GREAT-1167

After submitting your PR, CI checks will run and @cla-bot will check for your CLA signature.

For a PR with nontrivial changes, we review with both design-centric and code-centric lenses.

In a design review, we aim to ensure that the PR is consistent with our relationship to the open source community, with our software architecture and abstractions, and with our users' needs and expectations. That review often starts well before a PR, for example in github issues or slack, so please link to relevant conversations in notes below to help reviewers understand and approve your PR more quickly (e.g. closes #123).

Previous Design Review notes:

Definition of Done

Please delete options that are not relevant.

• [x] My code follows the Great Expectations style guide
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] I have added unit tests where applicable and made sure that new and existing tests are passing.
• [x] I have run any local integration tests and made sure that nothing is broken.

Thank you for submitting!

[ghost]

👇 Click on the image for a new way to code review

• Make big changes easier — review code in small groups of related files

• Know where to start — see the whole change at a glance

• Take a code tour — explore the change with an interactive tour

• Make comments and review — all fully sync’ed with github

  Try it now!

Legend

[netlify[bot]]

✅ Deploy Preview for niobium-lead-7998 ready!

Name	Link
🔨 Latest commit	3bac055ac1bc7933493fba37cdae13913e248451
🔍 Latest deploy log	https://app.netlify.com/sites/niobium-lead-7998/deploys/62f46f1f70cd720008eb91d0
😎 Deploy Preview	https://deploy-preview-5735--niobium-lead-7998.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.