Add tests for date_spine macro, and sub macros

[QMalcolm]

resolves dbt-labs/dbt-core#8172

Problem

In dbt-labs/dbt-core#8172 we moved the date_spine macro and sub macros from dbt-utils to dbt-core. As such we should begin testing these macros to ensure they work properly on this adapter.

Solution

Begin running the tests for the date_spine macro and sub macros

Checklist

• I have read the contributing guide and understand what's expected of me
• I have run this code in development and it appears to resolve the stated issue
• This PR includes tests, or tests are not required/relevant for this PR
• This PR has no interface changes (e.g. macros, cli, logs, json artifacts, config files, adapter interface, etc) or this PR has already received feedback and approval from Product or DX

[colin-rogers-dbt]

integration test issue:

01:25:51  1 of 2 ERROR creating sql view model test16969875427802607843_test_utils.test_get_intervals_between  [ERROR in 1.73s]
01:25:51  2 of 2 SKIP test assert_equal_test_get_intervals_between_intervals__expected ... [SKIP]
01:25:51  
01:25:51  Finished running 1 view model, 1 test in 0 hours 0 minutes and 4.99 seconds (4.99s).
01:25:51  
01:25:51  Completed with 1 error and 0 warnings:
01:25:51  
01:25:51    Database Error in model test_get_intervals_between (models/test_get_intervals_between.sql)
  Invalid datetime string "09/12/2023"

fixed tests