Updates to add Nanopore sequencing data

[Snehal1894]

This change also involved model change. So migration required in cLIMS.

1.One button can be used to upload all the file paths.

2. Exp Name, Run Name and File Path are compulsory fields and data should be present for all the entries.
3. The format has to be followed as mentioned in .csv file template to be downloaded from import page
4. Based on sequencing run platform (Nanopore), it is decided whether the file paths are for nanopore or other.
5. If the run is "Nanopore" , the Type column has be filled for all entried.
6. Missing data is allowed for md5,sha256 and backup path.
7. At a time, entries from only sequencing run should be entered.