fix: the component controller is not notified when a backup for h-scale becomes ready

[leon-inf]

fix #8469

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 50.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 61.21%. Comparing base (bc7dd2f) to head (f210a75). Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
controllers/apps/transformer_component_workload.go	50.00%	2 Missing and 4 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #8473 +/- ## ========================================== - Coverage 61.22% 61.21% -0.02% ========================================== Files 351 351 Lines 41854 41858 +4 ========================================== - Hits 25624 25622 -2 - Misses 13906 13919 +13 + Partials 2324 2317 -7 ``` | [Flag](https://app.codecov.io/gh/apecloud/kubeblocks/pull/8473/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apecloud) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/apecloud/kubeblocks/pull/8473/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apecloud) | `61.21% <50.00%> (-0.02%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apecloud#carryforward-flags-in-the-pull-request-comment) to find out more.

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[leon-inf]

/cherry-pick release-1.0-beta

[github-actions[bot]]

🤖 says: cherry pick action finished successfully 🎉!
See: https://github.com/apecloud/kubeblocks/actions/runs/11889439687