nginx: fix module depends on nginx

nginx: fix module depends on nginx

Closes #28587
nginx: many module recursive dependencies

The solution turns out to be pretty trivial.
Replace the +nginx in the module DEPENDS.

This means the modules do not 'select' nginx, but the do 'depend on'
nginx. So nginx is required to install the modules.

This is the same approach taken with PHP8 and #28585 for Zabbix.

Signed-off-by: Daniel F. Dickinson <redacted>