update integrations docs to reflect running against EE

See merge request !1072



Merged-by: Rémy Coutable <remy@rymai.me>
Approved-by: Erick Banks <ebanks@gitlab.com>
Approved-by: Rémy Coutable <remy@rymai.me>
Co-authored-by: Sean Gregory <sgregory@gitlab.com>

Add importers scenario type

See merge request !1078



Merged-by: Andrejs Cunskis <acunskis@gitlab.com>
Approved-by: Will Meek <wmeek@gitlab.com>