Fix marketplace image versioning by passing release version from release pipeline

[kspearrin]

• Fix marketplace workflows using incorrect versions during releases — Azure published 0.0.15 instead of 2026.3.2 because the event name check (== "release") never matched (workflows are triggered via workflow_dispatch)
• Pass release_version input from release.yml to all three marketplace workflows (AWS, Azure, DigitalOcean) so image versions match the self-host release version, not coreVersion from version.json
• Update image cleanup conditions to key off inputs.release_version instead of the unreachable github.event_name != 'release' check

[github-actions]

Checkmarx One – Scan Summary & Details – f4f29f00-e07d-4ed6-b47b-7ad44f4a407d

Great job! No new security vulnerabilities introduced in this pull request

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud