N21-1971 cancel migration wizard

[mrikallab]

Short Description

This PR will introduce cancelation button and modal on migration wizard to cancel the whole migration process.

Links to Ticket and related Pull-Requests

• N21-1971 cancel migration wizard schulcloud-server#5026
• https://ticketsystem.dbildungscloud.de/browse/N21-1971

Changes

Data-security

Deployment

New Repos, NPM packages or vendor scripts

Screenshots of UI changes

Checklist before merging

• QA: In addition to review, the code has been manually tested (if manual testing is possible)
• PO: Any deviation from requirements was agreed with Product-Owner / ticket author / support-team
• DEV: Every new component is implemented having accessibility in mind (e.g. aria-label, role property)

Notice: Please keep this Pull-Request as a Draft (or add WIP label), until it is ready to be reviewed

[sonarcloud]

Quality Gate failed

Failed conditions
61.9% Coverage on New Code (required ≥ 80%)

See analysis details on SonarCloud