This PR prepares the release `v0.35.0-alpha.1`.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Chores**
* Updated multiple container image tags and digests across various
components to version v0.35.0-alpha.1, ensuring use of the latest
pre-release images.
* Switched some image references from generic or "latest" tags to
specific versioned tags for improved reproducibility.
* Updated version references in configuration files and dashboards to
reflect the new pre-release version.
* Applied minor formatting and whitespace cleanups in configuration
files.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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