test: add code suggestions e2e spec

Description

Adds 2 code suggestions tests to e2e the framework: code completion and code generation.

Related Issues

Resolves #1130 (closed)

How has this been tested?

Run the test-e2e job in the MR pipeline.

Or follow instructions here to test locally.

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)
• Documentation
• Chore (Related to CI or Packaging to platforms)
• Test gap