OSDOCS-2974: Added ap-northest-3 to ROSA/OSD.

Author: EricPonvelle

modules/rosa-sdpolicy-account-management.adoc

@@ -99,6 +99,7 @@ The following AWS regions are supported by Red Hat OpenShift 4 and are supported
 - ap-east-1 (Hong Kong, AWS opt-in required)
 - ap-northeast-1 (Tokyo)
 - ap-northeast-2 (Seoul)
+- ap-northeast-3 (Osaka)
 - ap-south-1 (Mumbai)
 - ap-southeast-1 (Singapore)
 - ap-southeast-2 (Sydney)

modules/sdpolicy-account-management.adoc

@@ -135,6 +135,7 @@ The following AWS regions are supported by {OCP} 4 and are supported for {produc
 * ap-east-1 (Hong Kong, AWS opt-in required)
 * ap-northeast-1 (Tokyo)
 * ap-northeast-2 (Seoul)
+* ap-northeast-3 (Osaka)
 * ap-south-1 (Mumbai)
 * ap-southeast-1 (Singapore)
 * ap-southeast-2 (Sydney)