Add E2E to test deleting a file from snippet
What does this MR do?
Adds an E2E to delete one file from a personal/project snippet and make it single-file. Adds coverage for recently added Snippets with Multiple Files feature.
It also modifies snippet creation via API to allow for multi-file snippets.
Closes gitlab-org/quality/testcases#1023 (closed).
Does this MR meet the acceptance criteria?
Conformity
Edited by Anastasia McDonald