Create DeclarativeTableViewController and remove DeclarativeSection logic from TableViewController

[BenShutt]

Description

Fix issue with implementing both:

tableView(_:titleForHeaderInSection:)
tableView(_:viewForHeaderInSection:)

Use of DeclarativeSection will now require use of DeclarativeTableViewController
Note - this was actually never merged, this is a fix into a release branch.

Motivation and Context

Fixing previous change

How Has This Been Tested?

Referencing apps

Screenshots (if appropriate):

Types of changes

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

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.