Fix language switcher CSRF error when interacting before login #11528

[jacobtylerwalls]

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Description of Change

The language switcher component assumes there is a CSRF token set already, but we weren't setting it before login. This PR now sets the csrf token when we render the language switcher.

To reproduce the problem without this patch:

• delete cookies
• enable multiple languages, rebuild frontend
• load the arches homepage
• navigate to search (it's an unrelated bug that the switcher is not rendering on the index page, see console errors)
• switch the language
• result: csrf error

Issues Solved

Closes #11528

Checklist

• I targeted one of these branches:
  • dev/7.6.x (main support): crash (unexpected exception)
• I added a changelog in arches/releases
• I submitted a PR to arches-docs (if appropriate)
• Unit tests pass locally with my changes
• I added tests that prove my fix is effective or that my feature works
• My test fails on the target branch

Ticket Background

• Sponsored by:
• Found by: @ads04r
• Tested by: @jacobtylerwalls
• Designed by: @

[chiatt]

Looks good!