textproc/kibana7: Update to 7.9.3

Changelog for 7.9.3:

• Enhancement:
  • Reporting
    • Increases openUrl timeout config default to 1min #78322
• Bug fixes:
  • Discover
    • Fixes scripted field error handling for non OSS env #76476
    • Lens and visualizations
    • Shows tooltip on external pointer events #77306
  • Management
    • Fixes a bug in the index template wizard, which resulted in an error when the user tries to save an existing template or attempts to view the Elasticsearch request when the template does not have any mappings #78653
    • Fixes index pattern creation when using cross cluster search with clusters running <7.9 #80006
  • Monitoring
    • Fixes UX around an unavailable remote cluster #79202
    • Synchronous setup and start methods #79457
    • Removes license refresh from setup #79518
  • Platform
    • Invalid searchSourceJSON causes saved object migration to fail #78535
    • Changes legacy import version field to optional #79706
  • Security
    • Adds xpack.security.sameSiteCookies to docker allow list #78192
    • Updates user table after user is deleted #79491

PR: 250603
Submitted by: Juraj Lutter <juraj@lutter.sk>