* Add (preview) diff mode support ec2_group
* Add diff mode to some ec2_group integration tests
* Remove unnecessary arguments and add comment to the module notes
* Add changelog
* Refactor ec2_group
Replace nested for loops with list comprehensions
Purge rules before adding new ones in case sg has maximum permitted rules
* Add check mode tests for ec2_group
* add tests
* Remove dead code
* Fix integration test assertions for old boto versions
* Add waiter for security group that is autocreated
* Add support for in-account group rules
* Add common util to get AWS account ID
Fixes#31383
* Fix protocol number and add separate tests for egress rule handling
* Return egress rule treatment to be backwards compatible
* Remove functions that were obsoleted by `Rule` namedtuple
* IP tests
* Move description updates to a function
* Fix string formatting missing index
* Add tests for auto-creation of the same group in quick succession
* Resolve use of brand-new group in a rule without a description
* Clean up duplicated get-security-group function
* Add reverse cleanup in case of dependency issues
* Add crossaccount ELB group support
* Deal with non-STS calls to account API
* Add filtering of owner IDs that match the current account
