chore: Remove obsolute backup-to-gitlab workflow

[ArchieMeng]

Log: Remove obsolute backup-to-gitlab workflow

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 删除了.github/workflows/backup-to-gitlab.yml和call-build-distribution.yml文件，需要确认这些操作是否是有意为之，以及是否有相应的替代方案处理数据备份和构建分发的工作。
• 文件删除操作可能会影响GitHub Actions workflow的执行，需要确保相关的工作流程不会因此受到影响。

是否建议立即修改:

• 是，需要确保删除的文件不会对现有功能产生负面影响，并且有替代的机制来处理这些操作。同时，应该检查是否有必要删除这些文件，以及是否有其他方式来实现相同的功能。

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ArchieMeng, BLumia

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