gitea dump should have option to ignore bleve index

[johanvdw]

Feature Description

I noticed that about half of the size of our gitea dumps is the file data/indexers/repos.bleve (1.7 Gb)

I'm considering adding an option to skip these indexers when calling gitea dump, similar to how lfs and attachment data can be skipped.

However, before diving in the code: do you think this is a good idea? Would restore from such a dump still work?

Screenshots

No response