fix(region-info): incorrect S3 static website endpoint for us-gov-wes…

…t-1 (#10920)

[`s3-website-us-gov-west-1.amazonaws.com`](https://docs.aws.amazon.com/govcloud-us/latest/UserGuide/using-govcloud-endpoints.html)
[`us-gov-west-1` announced in Aug 2011](https://aws.amazon.com/blogs/aws/new-aws-govcloud-us-region/)
#4584

https://github.com/aws/aws-cdk/blob/36fea2824787f47692e78fb5de063f89f5c7da5d/packages/%40aws-cdk/region-info/build-tools/generate-static-data.ts#L47-L49

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk/region-info/build-tools/fact-tables.ts

@@ -2,6 +2,7 @@ export const AWS_OLDER_REGIONS = new Set([
   'us-east-1',
   'us-west-1',
   'us-west-2',
+  'us-gov-west-1',
   'ap-southeast-1',
   'ap-southeast-2',
   'ap-northeast-1',

packages/@aws-cdk/region-info/test/__snapshots__/region-info.test.js.snap

@@ -426,7 +426,7 @@ Object {
     "cdkMetadataResourceAvailable": false,
     "domainSuffix": "amazonaws.com",
     "partition": "aws-us-gov",
-    "s3StaticWebsiteEndpoint": "s3-website.us-gov-west-1.amazonaws.com",
+    "s3StaticWebsiteEndpoint": "s3-website-us-gov-west-1.amazonaws.com",
     "servicePrincipals": Object {
       "application-autoscaling": "application-autoscaling.amazonaws.com",
       "autoscaling": "autoscaling.amazonaws.com",