Open Data Hub manifests and their mapping to Elyra versions

[ptitzler]

Openshift version	ODH operator version	ODH manifest version	Elyra version
			Elyra v3.13.0
			Elyra v3.12.0
4.10	1.4.0	v1.4.0	Elyra v3.9.1
		v1.3.0	Elyra v3.9.1
		v1.2.0	Elyra v3.6.0

References:

• ODH manifest repository
• ODH Elyra image repository