Allow list elements to be translatable and left align data policy text

[louise-davies]

Description

See title. The data policy text I got from Silvia had a bullet-point list, so configuring i18next so we can render html lists properly, and then the data policy looked weird when it was middle aligned, so left aligned the data policies.

To test this, replace the data_policy string in public/res/default.json in datagateway-download to something like:

"data_policy": "Accept data policy: Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.<ul><li>Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</li><li>Duis aute irure dolor in reprehenderit in voluptate velit esse cillum lore eu fugiat nulla pariatur.</li><li>Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</li></ul>This is a <Link href=\"https://example.com/\">link to example.com</Link>."

and then go to the cart and pretend to mint a user-defined DOI and check that the data policy is rendering the list correctly and that it is left aligned.

There's also the data policy in the publish button, but the code is identical so probably don't need to double check both

Testing instructions

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

• Review code
• Check Actions build
• Review changes to test coverage

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.73%. Comparing base (251be13) to head (3d66b62).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1986   +/-   ##
========================================
  Coverage    96.72%   96.73%           
========================================
  Files          221      221           
  Lines        31463    31475   +12     
  Branches      4751     4751           
========================================
+ Hits         30434    30446   +12     
+ Misses        1025     1024    -1     
- Partials         4        5    +1     

Flag	Coverage Δ
common	95.48% <100.00%> (ø)
dataview	98.50% <100.00%> (+<0.01%)	⬆️
download	96.87% <100.00%> (+<0.01%)	⬆️
search	95.64% <100.00%> (+<0.01%)	⬆️

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