remove references to wagtailadmin/shared/field_as_li.html

Changed all references from wagtailadmin/shared/field_as_li.html to
wagtailadmin/shared/field.html wrapped within li tags.

References:
https://docs.wagtail.org/en/stable/releases/5.1.html#shared-include-field-as-li-html-will-be-removed
5 jobs for 5.2.1-ufrpe in 0 seconds (queued for 113 minutes and 34 seconds)
Name Stage Failure
failed
head Test There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job log
failed
lts_52 Test There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job log