ST6RI-956 Abstract syntax metamodel for KerML 1.1/SysML 2.1 Beta 2

[seidewitz]

This PR updates the implemented metamodel to the baseline for KerML 1.1/SysML 2.1 Beta 2. It accounts for resolutions that effect the abstract syntax from KerML 1.1 RTF Ballot 3 and SysML 2.1 RTF Ballot 3 .

Changes

1. Regenerated the .uml and .ecore metamodel files in org.omg.sysml/model.
2. Copied SysML.ecore and SysML.genmodel to org.omg.sysml.model/src/main/resources/model.
3. Regenerated EMF Java files in org.omg.sysml.model/src/main/java. The resulting changes wr only in comments of metaclass interfaces that transcribe OCL.

Notes

1. The metamodel version remains 20250201 as there are no substantive code changes. So, this update remains code compatible with release 2026-05 for KerML 1.1/SysML 2.1 Beta 1.
2. This PR does not include any changes to operation and constraint implementation or model libraries, which will be handled in future PRs.