Cannot provide a body param to shutdown.putNode

[lukeelmers]

🐛 Bug Report

It is not possible to provide a body when calling shutdown.putNode, and ES requires a body for this API. It appears that body is being defaulted to undefined but it is never overwritten if params.body is provided:

elasticsearch-js/src/api/api/shutdown.ts

Lines 104 to 117 in 4492532

	const body = undefined
	for (const key in params) {
	if (acceptedPath.includes(key)) {
	continue
	} else if (key !== 'body') {
	// @ts-expect-error
	querystring[key] = params[key]
	}
	}
	const method = 'PUT'
	const path = `/_nodes/${encodeURIComponent(params.node_id.toString())}/shutdown`
	return await this.transport.request({ path, method, querystring, body }, options)

To Reproduce

Steps to reproduce the behavior:

      await client.shutdown.putNode({
        node_id: 'test_node_01',
        // ts also complains about the presence of `body`, so you need a @ts-expect-error
        body: {
          type: 'restart',
          reason: 'testing shutdown',
          allocation_delay: '20m',
        },
      });

Response:

ResponseError: parse_exception: [parse_exception] Reason: request body is required

Expected behavior

The provided body should be passed to ES, and the TS types shouldn't complain about it.

Your Environment

• node version: 16.4.2
• @elastic/elasticsearch version: 8.2.0-canary.2 (but I suspect this has been present for several versions now)
• os: Mac
• discovered this while writing an integration test for Kibana that attempted to use the node shutdown API