Add info about the Terraform provider (#5728)

## What are you changing in this pull request and why?
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Fixes #4210 , adding information about the Terraform provider in the
docs.

For now, this info is mostly about adding links to the provider and
existing documentation on the Terraform registry.

## Checklist
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- [ ] Add versioning components, as described in [Versioning
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- [x] Review the [Content style
guide](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/content-style-guide.md)
so my content adheres to these guidelines.
- [x] For [docs
versioning](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#about-versioning),
review how to [version a whole
page](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#adding-a-new-version)
and [version a block of
content](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#versioning-blocks-of-content).
- [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."

Adding or removing pages (delete if not applicable):
- [x] Run link testing locally with `npm run build` to update the links
that point to deleted pages

Main change:

![image](https://github.com/dbt-labs/docs.getdbt.com/assets/8754100/ebc9a4ea-a934-4857-bdc5-7227b28fb2a8)

---------

Co-authored-by: Mirna Wong <[email protected]>

website/docs/docs/dbt-cloud-apis/admin-cloud-api.md

@@ -13,6 +13,8 @@ The dbt Cloud Administrative API is enabled by default for [Team and Enterprise
 
 dbt Cloud currently supports two versions of the Administrative API: v2 and v3. In general, v3 is the recommended version to use, but we don't yet have all our v2 routes upgraded to v3. We're currently working on this. If you can't find something in our v3 docs, check out the shorter list of v2 endpoints because you might find it there. 
 
+Many endpoints of the Administrative API can also be called through the [dbt Cloud Terraform provider](https://registry.terraform.io/providers/dbt-labs/dbtcloud/latest). The built-in documentation on the Terraform registry contains [a guide on how to get started with the provider](https://registry.terraform.io/providers/dbt-labs/dbtcloud/latest/docs/guides/1_getting_started) as well as [a page showing all the Terraform resources available](https://registry.terraform.io/providers/dbt-labs/dbtcloud/latest/docs/guides/99_list_resources) to configure.
+
 <div className="grid--2-col">
 
 <Card
@@ -33,4 +35,18 @@ link="/dbt-cloud/api-v2"
 link="/dbt-cloud/api-v3"
     icon="pencil-paper"/>
 
+<div className="card-container">
+ <Card
+    title="dbt Cloud Terraform provider"
+    link="https://registry.terraform.io/providers/dbt-labs/dbtcloud/latest"
+    body="The Terraform provider maintained by dbt Labs which can be used to manage a dbt Cloud account."
+    icon="pencil-paper"/>
+    <a href="https://registry.terraform.io/providers/dbt-labs/dbtcloud/latest"
+    className="external-link"      
+    target="_blank"
+    rel="noopener noreferrer">
+    <Icon name='fa-external-link' />
+  </a>
+</div>
+
 </div>

website/docs/docs/dbt-cloud-apis/apis-overview.md

@@ -12,7 +12,7 @@ Accounts on the _Team_ and _Enterprise_ plans can query the dbt Cloud APIs.
 
 dbt Cloud provides the following APIs:
 
-- The [dbt Cloud Administrative API](/docs/dbt-cloud-apis/admin-cloud-api) can be used to administrate a dbt Cloud account.
+- The [dbt Cloud Administrative API](/docs/dbt-cloud-apis/admin-cloud-api) can be used to administrate a dbt Cloud account. It can be called manually or with [the dbt Cloud Terraform provider](https://registry.terraform.io/providers/dbt-labs/dbtcloud/latest).
 - The [dbt Cloud Discovery API](/docs/dbt-cloud-apis/discovery-api) can be used to fetch metadata related to the state and health of your dbt project.
 - The [dbt Semantic Layer APIs](/docs/dbt-cloud-apis/sl-api-overview) provides multiple API options which allow you to query your metrics defined in the dbt Semantic Layer.