resolveSigV4aSigningRegionSet
suspend fun resolveSigV4aSigningRegionSet(platform: <Error class: unknown class> = PlatformProvider.System, profile: <Error class: unknown class><AwsProfile>): Set<String>?
Attempts to resolve sigV4aSigningRegionSet from the JVM system properties, environment variables, and file based configuration
Return
The sigV4aSigningRegionSet if found, null if not