Replace deprecated Promtail with Grafana Alloy

[bruce-mig]

This issue is in relation to the Using Promtail, Loki and Grafana to access Tracee Logs tutorial, located in the documentation at https://aquasecurity.github.io/tracee/latest/tutorials/promtail/.

The tutorial uses Promtail which is now deprecated. (See https://grafana.com/docs/loki/latest/send-data/promtail/installation/#install-promtail.

Also the grafana/loki-distributed helm chart used in the tutorial is also deprecated. (See [grafana/loki-distributed](https://grafana.com/docs/loki/latest/setup/migrate/migrate-from-distributed/)).

The Grafana documentation recommends the following migrations:

Deprecated	New	Source
Promtail	Grafana Alloy	Migrate from Promtail to Grafana Alloy
loki-distributed Helm chart	loki Helm Chart, v3.0 or higher	Migrate from loki-distributed Helm chart

I propose updating the tutorial as below:

• Migrate from Promtail to Grafana Alloy
• Migrate from loki-distributed Helm chart to loki Helm Chart, v3.0 or higher

And also clarifying ways to access to Grafana Dashboard running in remote servers, using e.g. ssh tunneling to local machine.