fix(ingest): map all LookML dimension types to corresponding avro types

[jameslamb]

I noticed that when ingesting metadata for LookML files using the current state of master in this repo, I was getting warnings like the following:

The type 'date_month' is not recognized for field type, setting as NullTypeClass.
The type 'duration_hour' is not recognized for field type, setting as NullTypeClass.

I believe that's because some valid dimension types in LookML haven't been added to the mapping in datahub's LookML ingestion code. You can see the full list of dimension types at https://docs.looker.com/reference/field-reference/dimension-type-reference.

This pull request extends the work that was done in #2950 to map LookML dimension types to the corresponding avro types.

Checklist

• The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• Links to related issues (if applicable)
• Tests for the changes have been added/updated (if applicable)
• Docs related to the changes have been added/updated (if applicable)

Notes for Reviewers

I wasn't really sure what the right choice was for types like date_day_of_week_index (which is e.g. 0 on Sunday, 1 on Monday). I don't understand the implication of treating data like that as EnumTypeClass vs. NumberTypeClass. I expect reviewers will have some suggested changes to the types I chose here.

Thanks for your time and consideration!

[shirshanka]

LGTM!