Provider doc update for WS management (#1095)

* Provider doc update for WS management

Provider configuration section mentions module.ai to access the host & token. But there isn't such module. So fixing the doc to use the generate token during E2 workspace creation

* enforcing multi-module practice

* renaming module & removing unnecessary alias

Author: HimanshuAroraDb

docs/guides/aws-workspace.md

@@ -288,10 +288,12 @@ In [the next step](workspace-management.md), please use the following configurat
 
 ```hcl
 provider "databricks" {
-  host  = module.ai.databricks_host
-  token = module.ai.databricks_token
+  host  = module.e2.workspace_url
+  token = module.e2.token_value
 }
 ```
+We assume that you have a terraform module in your project that creats a workspace (using [Databricks E2 Workspace](#databricks-e2-workspace) section) and you named it as `e2` while calling it in the **main.tf** file of your terraform project. And `workspace_url` and `token_value` are the output attributes of that module. This provider configuration will allow you to use the generated token during workspace creation to authenticate to the created workspace.
+
 
 ### Credentials validation checks errors