_cat/shards does not show deleted document count

[rayshrey]

Is your feature request related to a problem? Please describe

While _cat/indices and _cat/segments both show the deleted document count, _cat/shards has no option for displaying the deleted document count.

Whenever we need deleted document count on a shard level we either have to aggregate results of _cat/segments or have to reply on _stats call with level set to shard.

Adding deleted doc count to _cat/shards will bring a uniformity with _cat/index and _cat/segments and will be handy for knowing deleted document count on a shard level as well.

Describe the solution you'd like

_cat/shards should include a deleted document count parameter like the one shown below

index  shard prirep state      docs del_docs store ip        node
index2 0     p      STARTED       9    0       5kb 127.0.0.1 b0be8357b2c9.ant.amazon.com

Related component

Other

Describe alternatives you've considered

No response

Additional context

No response