feat(kiali): remove kiali plugin

[aljesusg]

Remove kiali . Migrated to community fork.

This require backstage/community-plugins#1755

[changeset-bot]

⚠️ No Changeset found

Latest commit: 0400d62

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[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 SonarCloud

[04kash]

@aljesusg could keep still keep the README.md files for both plugins and add a deprecation note for both of them?
Eg: https://github.com/janus-idp/backstage-plugins/tree/main/plugins/3scale-backend

[openshift-merge-robot]

PR needs rebase.

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