Flacky test_list_all_indexes_raw test

[irevoire]

Description The following is a flacky test:

https://github.com/meilisearch/meilisearch-rust/blob/09f9eb5baac017b1b0a820c4646dd671ac883de3/src/client.rs#L936-L941

See the following github-action: https://github.com/meilisearch/meilisearch-rust/runs/6304373859?check_suite_focus=true

Not sure when it was introduced

Expected behavior Always succeed

Current behavior Regularely fail.

Any idea @irevoire ?