fix(ui): correct disabled call for install DLE button, conditionally call the snapshots API, increase cypress timeout duration, improve types

Description

• Fixed the issue where the button on DLE installation for was always disabled
• /dblab_instance_snapshots requests is now going to be conditionally called, only if the instance has an url

Related issue

Examples

Checklist

• MR description has been reviewed
• MR changes are functionally tested
• MR does NOT have API/CLI changes OR there are API/CLI changes and they have been reviewed & DOCS ARE ADJUSTED (reference doc, etc)
• MR does NOT have UI changes OR there are UI changes and they have been reviewed & UX IS REVIEWED