fix[frontend](integrations): added success notification on tenant suc…

[AlexSanchez-bit]

No description provided.

[github-actions]

✅ AI review — Approved

No issues detected in this diff.

✅ architecture (gemini-3-flash-lite) — clean

Summary: UI improvement adding success notifications for cloud tenant operations; no architectural impact.

No findings.

✅ bugs (gemini-3-flash-lite) — clean

Summary: Added success toast notifications for cloud tenant creation and updates across multiple locales.

No findings.

✅ security (gemini-3-flash-lite) — clean

Summary: The PR adds success toast notifications for cloud tenant creation and updates; no security vulnerabilities or information disclosures identified.

No findings.

[utmstackprapprover]

Approved — no blocking issues, deps OK, authorized author. Any non-blocking warnings are listed above.