Add preview tests coverage for space dav version

[amrita-shrestha]

Currently, API tests don't cover space webdav of preview in personal space and share space.

• Add preview tests coverage for space webdav [tests-only][full-ci] Add test coverage for file preview using space dav version #7218
• add tests coverage for previewing shared resource in spaces webdav @PrajwolAmatya [tests-only][full-ci] added test for previewing shared resource using spaces dav version #7234
• add tests coverage for preview space shares [tests-only][full-ci] added test for previewing shared resource inside project space #7544

[amrita-shrestha]

#6770

[SwikritiT]

Blocked by #2071 see discussion or more info #6770 (comment)

[PrajwolAmatya]

All test coverages are completed, so closing this issue.