Add Indices.AnalyzeAsync to 8.x

[mwrothbe-intc]

Is your feature request related to a problem? Please describe.
Ver 7.x of the client has Indices.AnalyzeAsync. However, it is on the list of unsupported features for 8.x: #7890 . I'm using this function as a critical feature of my application and the lack of it is preventing full migration from 7 to 8.

Describe the solution you'd like
Please implement Indices.AnalyzeAsync or provide a means of achieving the same functionality in 8.x.

Describe alternatives you've considered
Continue to run 7 and 8 in parallel. This is not a long term solution.

[flobernd]

Hi @mwrothbe-intc, I'm currently in the process of improving the code generator in order to generate all missing endpoints which do exist in v7.* and the ones that are new in ES v8.* and still missing in the v8.* client. There is still quite a lot of work to do, but the feature will definitely be available again.

I'm going to close this issue as it will resolve "automatically" after the generator work is done.