Allow site admins to upload data for multiple sites at once

resolves https://github.com/aqualinkorg/aqualink-app/issues/903

Adds a separate endpoint which enables uploading sheets containing aqualink_site_id, aqualink_survey_point_id and aqualink_sensor_type. Changes data_uploads-sites relation from many-to-one to many-to-many Adds a dedicated page for multiple site uploads Changes uploads history table, adding a "AFFECTED SITE IDS" column

Before the migration we should take a backup of the data uploads table. for example: pg_dump -h localhost -p 54321 -U postgres -W -t public.data_uploads > ~/dump_data_uploads.sql and insert, after the migration, the relevant Ids.

TODO:

[x] test coverage
[x] fix old uploads history table and make sure the change in schema does not break anything else
[x] web

A new page, specifically for this type of uploads, is added, which would be found on the top right drop down, if the user is site admin or admin

Screenshot from 2023-07-25 18-53-48

aqualinkorg / aqualink-app

Allow site admins to upload data for multiple sites at once #904