Drop user_details.other_role column

What does this MR do and why?

Drop user_details.other_role column

Related to #364286 (closed)

Original MR !45635 (diffs)

How to set up and validate locally

$ bin/rails db:migrate:up:main VERSION=20220822071909
main: == 20220822071909 RemoveOtherRoleFromUserDetails: migrating ===================
main: -- remove_column(:user_details, :other_role, :text)
main:    -> 0.0070s
main: == 20220822071909 RemoveOtherRoleFromUserDetails: migrated (0.0081s) ==========

$ bin/rails db:migrate:down:main VERSION=20220822071909
main: == 20220822071909 RemoveOtherRoleFromUserDetails: reverting ===================
main: -- add_column(:user_details, :other_role, :text)
main:    -> 0.0047s
main: == 20220822071909 RemoveOtherRoleFromUserDetails: reverted (0.0079s) ==========

MR acceptance checklist

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