[Policies,Raisinbread] Add translation capabilities

[skarya22]

Brief summary of changes

• Copied the logic for Config from [dashboard/multilingual] Add multilingual config settings #9994 so that policies can be translated in the same way
• Added translations for Raisinbread policies
• Projects can translate policies by adding the text to the new policiesI18n table

Testing instructions (if applicable)

1. Open a clean instance of loris and create the policiesI18n table and populate it (or just run make testdata after switching to the branch)
2. Change languages on the Login page and press Terms of Use in each language, see that all text is translated
3. Login and go to the DQT Beta. See that the policy popup appears. It should be in the language you have selected. Decline the popup and change languages and open the DQT beta again, it should ask in the new language now.
4. If you accidentally accept the popup, you can clear the user_policy_decision table to get the popup again.

Link(s) to related issue(s)

• Remake of [dataquery + login] Translate Terms of Use menu label and popup text #10392
• Closes [dataquery + login] "Terms of Use" not translated #10263