api acceptance tests for webdav locking that send the token in the request

[individual-it]

a request on a locked item should be blocked, except the token is send with the request
token must be "owned" by the user that makes the request

[ownclouders]

GitMate.io thinks possibly related issues are #33690 (cleanup acceptance tests WebDav trait), #32510 (fix API acceptance test steps, so that they really use old/new webdav path), #32366 (Expand webDAV API acceptance tests), #34273 (API acceptance tests to UNLOCK locked files), and #34322 (acceptance tests for locks on reshared shares).