Page info doesn't follow filter criterias

[Hui-Chong]

TODO

Change the behavior of get_page_info function in crud.py.

def get_page_info(kind: str, page_size: int, page: int, db: Session,
                  accession: str = None, search_text: str = None):
    if kind == 'amp':
        total_items = db.query(models.AMP.accession).count()