Consolidation and automatic bump of K3 versions

[dvojtise]

Description

Changes the update site of K3 in order to follow its releases

Contribution to issues

Contribute to https://github.com/eclipse/gemoc-studio/issues/223

Companion Pull Requests

• PR https://github.com/eclipse/gemoc-studio/pull/224
• PR https://github.com/eclipse/gemoc-studio-modeldebugging/pull/185
• PR https://github.com/eclipse/gemoc-studio-execution-java/pull/16
• PR https://github.com/eclipse/gemoc-studio-execution-ale/pull/47
• PR https://github.com/eclipse/gemoc-studio-execution-moccml/pull/51