Add Snowflake ingestion config options: allow_empty_schemas, skip_standard_edition_check

[AndrewSmith593]

The following config options are added with this PR. allow_empty_schemas was added to avoid a generic permissions error that was being thrown when attempting to ingest schemas with no tables/views. skip_standard_edition_check was added in order to avoid redundant/repetitive/costly calls to show_tags() which was causing unnecessary "Cloud" compute credits to be spent in Snowflake. These config options have been tested thoroughly in Stage environment of Optum datahub fork.

allow_empty_schemas - If set to True, allows schemas with no tables or views to be processed, without reporting generic permissions error. Default is False.

skip_standard_edition_check - If set to True, assumes this is Datahub Enterprise Edition, and skips the check for standard edition. Default is False.

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). If a new feature has been added a Usage Guide has been added for the same.
• [] For any breaking change/potential downtime/deprecation/big changes an entry has been made in Updating DataHub

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...datahub/ingestion/source/snowflake/snowflake_v2.py	50.00%	1 Missing ⚠️

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