resource/aws_glacier_vault: Fixes for tfproviderlint R002

Reference: #9952

Remove pointer value dereferences, which can cause potential panics and are extraneous as `Set()` automatically handles pointer types including when `nil`.

Previously:

```
aws/resource_aws_glacier_vault.go:105:20: R002: ResourceData.Set() pointer value dereference is extraneous
```

Output from acceptance testing:

```
--- PASS: TestAccAWSGlacierVault_basic (22.38s)
--- PASS: TestAccAWSGlacierVault_full (26.27s)
--- PASS: TestAccAWSGlacierVault_RemoveNotifications (38.22s)
```

aws/resource_aws_glacier_vault.go

@@ -102,7 +102,7 @@ func resourceAwsGlacierVaultCreate(d *schema.ResourceData, meta interface{}) err
 	}
 
 	d.SetId(d.Get("name").(string))
-	d.Set("location", *out.Location)
+	d.Set("location", out.Location)
 
 	return resourceAwsGlacierVaultUpdate(d, meta)
 }