Adds cat node -h values

[charlotte-hoblik]

This PR adds the enumerated values for the -h parameter in the following APIs:

• cat shards
• cat thread pool

Related issue: #4345

[github-actions]

Following you can find the validation changes for the API you have modified.

API	Status	Request	Response
cat.thread_pool	🟢 → 🔴	9/9 → 5/9	9/9

You can validate this API yourself by using the make validate target.

[lcawl]

Suggested change

	* * `NODE_RESTARTING`: Similar to NODE_LEFT, except that the node was registered as restarting using the Node shutdown API.
	* * `NODE_RESTARTING`: Similar to `NODE_LEFT`, except that the node was registered as restarting using the Node shutdown API.

[lcawl]

The size of completion. For example: 0b.

Not a big deal but I noticed this one starts with "The" and the rest don't. IMO they ought to be consistent.

[lcawl]

I tested the output by running the following commands:

make generate
make transform-to-openapi-for-docs
make overlay

And the output looks good when I upload it to our publishing site. For example:

[lcawl]

Left two minor comments, otherwise output LGTM!