Time spine move from dbt-utils to dbt-core (#4263)

Previews:
-
[1.6](https://docs-getdbt-com-git-time-spine-dbt-labs.vercel.app/docs/build/metricflow-time-spine?version=1.6)
-
[1.7](https://docs-getdbt-com-git-time-spine-dbt-labs.vercel.app/docs/build/metricflow-time-spine?version=1.7)

## What are you changing in this pull request and why?

Closes: #4124

Move time_spine from dbt-utils to dbt-core


Uncomment if you're publishing docs for a prerelease version of dbt
(delete if not applicable):
- [x] Add versioning components, as described in [Versioning
Docs](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#versioning-entire-pages)
- [x] Add a note to the prerelease version [Migration
Guide](https://github.com/dbt-labs/docs.getdbt.com/tree/current/website/docs/guides/migration/versions)

- [x] Review the [Content style
guide](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/content-style-guide.md)
and [About
versioning](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#adding-a-new-version)
so my content adheres to these guidelines.
- [x] Add a checklist item for anything that needs to happen before this
PR is merged, such as "needs technical review" or "change base branch."

website/docs/docs/build/metricflow-time-spine.md

@@ -12,6 +12,8 @@ To create this table, you need to create a model in your dbt project called `met
 
 <File name='metricflow_time_spine.sql'>
 
+<VersionBlock lastVersion="1.6">
+
 ```sql
 {{
     config(
@@ -38,8 +40,44 @@ final as (
 
 select * from final
 ```
+
+</VersionBlock>
+
+<VersionBlock firstVersion="1.7">
+
+```sql
+{{
+    config(
+        materialized = 'table',
+    )
+}}
+
+with days as (
+
+    {{
+        dbt.date_spine(
+            'day',
+            "to_date('01/01/2000','mm/dd/yyyy')",
+            "to_date('01/01/2027','mm/dd/yyyy')"
+        )
+    }}
+
+),
+
+final as (
+    select cast(date_day as date) as date_day
+    from days
+)
+
+select * from final
+```
+
+</VersionBlock>
+
 </File>
 
+<VersionBlock lastVersion="1.6">
+
 ```sql
 -- filename: metricflow_time_spine.sql
 -- BigQuery supports DATE() instead of TO_DATE(). Use this model if you're using BigQuery
@@ -61,4 +99,33 @@ final as (
 select *
 from final
 ```
+
+</VersionBlock>
+
+<VersionBlock firstVersion="1.7">
+
+```sql
+-- filename: metricflow_time_spine.sql
+-- BigQuery supports DATE() instead of TO_DATE(). Use this model if you're using BigQuery
+{{config(materialized='table')}}
+with days as (
+    {{dbt.date_spine(
+        'day',
+        "DATE(2000,01,01)",
+        "DATE(2030,01,01)"
+    )
+    }}
+),
+
+final as (
+    select cast(date_day as date) as date_day
+    from days
+)
+
+select *
+from final
+```
+
+</VersionBlock>
+
 You only need to include the `date_day` column in the table. MetricFlow can handle broader levels of detail, but it doesn't currently support finer grains.