added new properties

[ammokhov]

Issue #, if available:

Description of changes:

additional properties to BaseResourceHandlerRequest interface:

• desiredResourceTags: Optional[Mapping[str, Any]]
• systemTags: Optional[Mapping[str, Any]]
• awsAccountId: Optional[str]
• region: Optional[str]
• awsPartition: Optional[str]*

*- there are no good methods in boto.session or regions to retrieve current partition. we can use get_available_partitions to get list of partitions but that is not what is needed. We cant get endpoint interface either as get_available_endpoints returns list of str. There is an outstanding PR to get partition by region boto/botocore#1715. We could replicate something like that but might make sense to just wait.

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

[rjlohan]

It won't necessarily be 100% future proof, but you could probably just hard code the awsPartition as a helper func.

if cn-north-1 || cn-northwest-1 == aws-cn
if us-gov-* == aws-us-gov
else == aws

[PatMyron]

It won't necessarily be 100% future proof, but you could probably just hard code the awsPartition as a helper func.

if cn-north-1 || cn-northwest-1 == aws-cn
if us-gov-* == aws-us-gov
else == aws

The other partitions are publicly documented as well, so we should hardcode those partitions as well while hardcoding