[sql gen] Properly create UNIQUE index on non string column. Closes #13728492
Unique was previously detected in a loop triggered only for String columns.
option_group_changed('port', 'main', 'web')
option_group_changed('query-log-file', 'main', 'web')
option_group_changed('profile', 'main', 'web')
option_group_changed('max-post-length', 'main', 'web')