Allow customizing the receptor image in the development environment (#11374)

* Allow for customizing the receptor image

* Hook in receptor image to docker-compose template

* Fix missing -e to pass into Dockerfile playbook

* Add some docs

tools/ansible/roles/dockerfile/templates/Dockerfile.j2

@@ -187,7 +187,7 @@ COPY --from=builder /var/lib/awx /var/lib/awx
 RUN ln -s /var/lib/awx/venv/awx/bin/awx-manage /usr/bin/awx-manage
 
 {%if build_dev|bool %}
-COPY --from=quay.io/ansible/receptor:devel /usr/bin/receptor /usr/bin/receptor
+COPY --from={{ receptor_image }} /usr/bin/receptor /usr/bin/receptor
 RUN openssl req -nodes -newkey rsa:2048 -keyout /etc/nginx/nginx.key -out /etc/nginx/nginx.csr \
         -subj "/C=US/ST=North Carolina/L=Durham/O=Ansible/OU=AWX Development/CN=awx.localhost" && \
     openssl x509 -req -days 365 -in /etc/nginx/nginx.csr -signkey /etc/nginx/nginx.key -out /etc/nginx/nginx.crt && \