The error message is unclear when creating a basic static web app which name is only one letter

OS: Win10
Build Version: 20220123.1
Regression: Not a regression

Repro Steps:

1. Create a basic static web app with name is only one letter, e.g. "t".
2. Check whether the error message is clear.

Expect:
The error message is clear.

Actual:
The error message is unclear.

Output Details:

6:11:26 PM: Creating resource group "t" in location "Central US"...
6:11:27 PM: Successfully created resource group "t".
6:11:27 PM: Creating new static web app "t"...
6:11:27 PM: Error: "resourceGroupName" with value "t" should satisfy the constraint "Pattern": /^[-\w\._\(\)]+[^\.]$/.

More Info:

1. This issue also reproduces when creating an advanced static web app with a resource group named only one letter, e.g. "t".
2. This issue doesn't reproduce when creating an advanced static web app with other resource group, e.g. "test".
3. Succeed to create a resource group which name is only one letter.

Start by reproducing the one-letter static web app and resource group cases described in the issue, then trace the error handling that presents the Azure validation response. Done means the failure explains the naming problem clearly for both basic and advanced static web apps, while valid names continue to work.