gzipping certain responses is known to cause problems with QR code logins.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3749

Gzipping at the synapse-reverse-proxy-companion level and not at the
level of the outer-most reverse-proxy (Traefik) also sounds non-ideal.

This change only affects setups powered by Synapse workers.

Non-worker setups (and setups powered by other homeservers) were not
having their requests go through synapse-reverse-proxy-companion anyway,
so this change does not affect them.

Future patches may enable response compression support at the Traefik level for
all setups.

Related to https://github.com/matrix-org/matrix-spec-proposals/pull/4108

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/3100

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3114

* add prometheus-nginxlog-exporter role

* Rename matrix_prometheus_nginxlog_exporter_container_url to matrix_prometheus_nginxlog_exporter_container_hostname

* avoid referencing variables from other roles, handover info using group_vars/matrix_servers

* fix: stop service when uninstalling

fix: typo

move available arch's into a var

fix: text

* fix: prometheus enabled condition

Co-authored-by: ikkemaniac <ikkemaniac@localhost>

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2090