Expand webDAV API acceptance tests

[phil-davis]

Parent issue #31403

• split webDAV API acceptance tests into a sensible set of features Split webdav feature #32365
• review the test scenarios in each feature and expand them to cover a "basic" set of test cases

(e.g. for each feature consider what an admin, subadmin, ordinary user, public, can and cannot do to with files/folders)

[ownclouders]

GitMate.io thinks possibly related issues are #31403 (Expand API acceptance tests), #31535 (Expand versions API acceptance tests), #31531 (Expand sharing API acceptance tests), #22492 (test), and #31579 (test).

[phil-davis]

This is an old and "general" issue. There might be newer more specific issues that have more detail about what is still remaining to cover.