feat(alerting): Add AWS SES Alerting Provider (#579)

* Add SES Provider

* Formatting

* Rename ses to aws-ses

* Typo

* Parse tag instead of type name

* Use aws.slice to convert string array & rename awsses -> aws-ses

* Rename type

* Update README.md

* Update alerting/config.go

* Rename package aws-ses to awsses

* Update README.md

* PR comments

---------

Co-authored-by: TwiN <twin@linux.com>

alerting/alert/type.go

@@ -5,6 +5,9 @@ package alert
 type Type string
 
 const (
+	// TypeAWSSES is the Type for the awsses alerting provider
+	TypeAWSSES Type = "aws-ses"
+
 	// TypeCustom is the Type for the custom alerting provider
 	TypeCustom Type = "custom"