Support force_reindex in the model Zoekt index methods for IndexingTaskWorker
## Background
`Search::Zoekt.index_async` and `Search::Zoekt.index_in` should support the force reindex for the task approach
## Proposal
Send the task type `force_index_repo` if there is `force` in the `option`
https://gitlab.com/gitlab-org/gitlab/-/blob/bb08d86fe0455a63d32930cd1a7caacd9769871c/ee/app/models/search/zoekt.rb#L44
https://gitlab.com/gitlab-org/gitlab/-/blob/bb08d86fe0455a63d32930cd1a7caacd9769871c/ee/app/models/search/zoekt.rb#L51
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issue