chore: generate and convert to shared account secret for sharding password defined with seed

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 21.00000% with 79 lines in your changes missing coverage. Please review.

Project coverage is 61.51%. Comparing base (b6416ec) to head (2e8763d). Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...rollers/apps/transformer_cluster_shared_account.go	19.38%	79 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #8146 +/- ## ========================================== + Coverage 61.13% 61.51% +0.38% ========================================== Files 359 360 +1 Lines 41291 41719 +428 ========================================== + Hits 25243 25665 +422 - Misses 13795 13797 +2 - Partials 2253 2257 +4 ``` | [Flag](https://app.codecov.io/gh/apecloud/kubeblocks/pull/8146/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/8146/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=apecloud) | `61.51% <21.00%> (+0.38%)` | :arrow_up: | 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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[Y-Rookie]

/approve

[Y-Rookie]

/cherry-pick release-0.9

[github-actions[bot]]

🤖 says: ‼️ cherry pick action failed.
See: https://github.com/apecloud/kubeblocks/actions/runs/10860637057