CLD-6297 - E2E tests improvements (#24541)

* Improve e2etests readme, remove unused apt install
* Add testing E2E Tests MultiOS
* Get rid of deprecation warning
* Smart selection of docker network driver for different OSes
* Unify makefile invocation for windows as well
* Tune JVM for ES and Keycloak
* fix: Made required changes to run locally on arm MacOS
* fix: FIxed network command and removed dashboard node user as it is not needed
* fix: make dashboard work for Mac
* Make runs without dashboard work again, make BROWSE tunable and document it

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Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: Antonis Stamatiou <stamatiou.antonis@gmail.com>

server/build/gitlab-dc.postgres.yml

@@ -94,5 +94,5 @@ services:
 
 networks:
   default:
-    external:
-      name: ${COMPOSE_PROJECT_NAME}
+    name: ${COMPOSE_PROJECT_NAME}
+    external: true