URLs based on hashes don't work properly on the search page

[lorenzo-cavazzi]

We use hashes in the URL to open modals/offcanvas on certain pages (based on useLocationHash).
This mechanism should work platform-wide for the project and group creation modals, but it conflicts with the query parameters solution on the search page.

We should fix that and remove the workaround from the NavbarV2 components, leaving only the CreateProjectV2Button and CreateGroupButton buttons.