Merge pull request #94737 from openshift-cherrypick-robot/cherry-pick-93388-to-enterprise-4.18

[enterprise-4.18] OSDOCS-13803# Add Thailand AWS region support

Author: ShaunaDiaz

modules/installation-aws-regions.adoc

@@ -29,6 +29,7 @@ The following AWS public regions are supported:
 * `ap-southeast-3` (Jakarta)
 * `ap-southeast-4` (Melbourne)
 * `ap-southeast-5` (Malaysia)
+* `ap-southeast-7` (Thailand)
 * `ca-central-1` (Central)
 * `ca-west-1` (Calgary)
 * `eu-central-1` (Frankfurt)