Bug/databricks get url parameter

[fivetran-catfritz]

What change does this PR introduce?

• Added macro extract_url_parameter to create special logic for Databricks instances not supported by dbt_utils.get_url_parameter(). The macro uses dbt_utils.get_url_parameter() for default, non-Databricks targets. See README for more details.

If this PR introduces a new macro, how did you test the new macro?

• Tested in linkedin_source on a Databricks SQL instance, which did not give errors like before.
  • Stems from [Bug] dbt_utils.get_url_parameter does not work for databricks dbt_linkedin_source#55.
• Also passes buildkite.

If this PR introduces a modification to an existing macro, which packages is the macro currently present in and what steps were taken to test compatibility across packages?

• Does not modify existing fivetran_utils macro, but is meant to replace dbt_utils.get_url_parameter().
• The affected packages tend use this macro at different stages, so the list is a result of a search for dbt_utils.get_url_parameter:
  • dbt_facebook_ads
  • dbt_google_ads_source
  • dbt_google_ads
  • dbt_linkedin_source
  • dbt_microsoft_ads
  • dbt_pinterest_source
  • dbt_reddit_ads
  • dbt_snapchat_ads
  • dbt_tiktok_ads_source
  • dbt_twitter_source
• Copy-cat issues have been created in these packages.

Did you update the README to reflect the macro addition/modifications?

• Yes
• No (provide further explanation)

[fivetran-joemarkiewicz]

@fivetran-catfritz great work on this PR! I just have a few small comments and suggestions I would like you to look at and address before approving. Let me know if you have any questions!

[fivetran-catfritz]

Thanks @fivetran-joemarkiewicz! I made the changes and added comments, so it's ready for re-review.

[fivetran-joemarkiewicz]

Thanks @fivetran-catfritz these changes look good to me! Let's hold off merging this to the live branch until we also incorporate the sql server updates as well.

If you have the time, would you be able to create a release branch for release/v0.4.9. We can then merge this branch into there, then the sql server updates into that branch as well before then rolling out the update to the live branch.