Tag interpreter type assistants.

[Issue: #330]
Tag TC definition assistants.

[Issue: #330]
Delete unused method.

[Issue: #330]
Delete empty assistant.

[Issue: #330]
Tag TC expression and module assistants.

[Issue: #330]
Merge remote-tracking branch 'origin/development' into ldc/quickies
Add deserialization of results from both test frameworks.

Still works a bit wonky and relies on old results not having .RESULT as
extension. We need to throw the old framework tests out soon.

[Issue: ]
Add class for bug regression tests.

[Issue: ]
Fix handling of field expressions in value collector

[Issue: close #392]
Tag TC pattern and lex name assistants.

[Issue: #330]
Tag TC statement assistants.

[Issue: #330]
Tag TC type assistants.

[Issue: #330]
Fix typo in assistant name.

[Issue: ]
Rename interpreter test files for new test framework.

[Issue: #395]
Delete duplicate interpreter tests.

[Issue: #395]
Delete unused tests.

[Issue: #395]
Initial work on external interpreter tests under ntf.

[Issue: #395]
Add specific test update property to each test.

[Issue: ]
Delete unused test files.

[Issue: #395]
Migrate all interpreter results to JSON format.

[Issue: #395]