Fix/remove dataset filesize

[Reillyhewitson]

This PR will close #{issue number}

Description

This removes the dataset filesize generation step to ensure that the new database triggers are used to generate filesizes.

Testing Instructions

Add a set up instructions describing how the reviewer should test the code

• Review code
• Check GitHub Actions build
• If icatdb Generator Script Consistency Test CI job fails, is this because of a deliberate change made to the script to change generated data (which isn't actually a problem) or is here an underlying issue with the changes made?
• Review changes to test coverage
• Does this change mean a new patch, minor or major version should be made? If so, does one of the commit messages feature fix:, feat: or BREAKING CHANGE: so a release is automatically made via GitHub Actions upon merge?
• {more steps here}

Agile Board Tracking

Connect to #{issue number}

[codecov]

Codecov Report

Base: 96.89% // Head: 96.89% // No change to project coverage 👍

Coverage data is based on head (5dce490) compared to base (4b121d6).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #403   +/-   ##
=======================================
  Coverage   96.89%   96.89%           
=======================================
  Files          39       39           
  Lines        3319     3319           
  Branches      310      310           
=======================================
  Hits         3216     3216           
  Misses         76       76           
  Partials       27       27           

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.