fix(slide): remove duplicated calls to render.engine.setContainer

[jikkai]

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Pull Request Checklist

• [x] Related tickets or issues have been linked in the PR description (or missing issue).
• [x] Naming convention is followed (do please check it especially when you created new plugins, commands and resources).
• [x] Unit tests have been added for the changes (if applicable).
• [x] Breaking changes have been documented (or no breaking changes introduced in this PR).

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 26.91%. Comparing base (cf584bd) to head (5c76763). Report is 1 commits behind head on dev.

Files	Patch %	Lines
...es/engine-render/src/render-manager/render-unit.ts	0.00%	1 Missing :warning:
packages/slides-ui/src/slides-ui-plugin.ts	0.00%	1 Missing :warning:
...es/ui/src/controllers/ui/ui-desktop.controller.tsx	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #2688 +/- ## ========================================== + Coverage 26.89% 26.91% +0.01% ========================================== Files 1636 1636 Lines 87994 87989 -5 Branches 18553 18552 -1 ========================================== + Hits 23670 23680 +10 + Misses 64324 64309 -15 ```

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[github-actions[bot]]

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