mgr/dashboard: Make form modal more flexible

mgr/dashboard: Make form modal more flexible

Now any input type is supported and the special binary type which will
use the cd-binary input and automatically format the binary size into
bytes when submitting.

Now any field can have custom validators and error messages.
The form will fallback on predefined error messages if not configured.
It will use the error messages provided by the binary min and max
validators. It still provides the error message for a required field.

Fixes: https://tracker.ceph.com/issues/38287
Signed-off-by: Stephan Müller <smueller@suse.com>