chore(region-info): metadata service is in eu-south-1, af-south-1 (#13598)

----

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

Author: RomainMuller

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

@@ -19,7 +19,7 @@ export const AWS_CDK_METADATA = new Set([
   // 'us-gov-west-1',
   // 'us-iso-east-1',
   // 'us-isob-east-1',
-  // 'af-south-1',
+  'af-south-1',
   'ap-south-1',
   'ap-east-1',
   // 'ap-northeast-3',
@@ -35,7 +35,7 @@ export const AWS_CDK_METADATA = new Set([
   'eu-west-2',
   'eu-west-3',
   'eu-north-1',
-  // 'eu-south-1',
+  'eu-south-1',
   'me-south-1',
   'sa-east-1',
 ]);

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

@@ -3,7 +3,7 @@
 exports[`built-in data is correct 1`] = `
 Object {
   "af-south-1": Object {
-    "cdkMetadataResourceAvailable": false,
+    "cdkMetadataResourceAvailable": true,
     "domainSuffix": "amazonaws.com",
     "partition": "aws",
     "s3StaticWebsiteEndpoint": "s3-website.af-south-1.amazonaws.com",
@@ -263,7 +263,7 @@ Object {
     "vpcEndPointServiceNamePrefix": "com.amazonaws.vpce",
   },
   "eu-south-1": Object {
-    "cdkMetadataResourceAvailable": false,
+    "cdkMetadataResourceAvailable": true,
     "domainSuffix": "amazonaws.com",
     "partition": "aws",
     "s3StaticWebsiteEndpoint": "s3-website.eu-south-1.amazonaws.com",