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

---------

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

e2e-tests/.ci/dashboard.start.sh

@@ -18,13 +18,18 @@ mme2e_log "Starting the dashboard"
 ${MME2E_DC_DASHBOARD} up -d db dashboard
 
 mme2e_log "Generating the dashboard's local URL"
-MME2E_DC_DASHBOARD_NETWORK=$(${MME2E_DC_DASHBOARD} ps -q dashboard | xargs -l docker inspect | jq -r '.[0].NetworkSettings.Networks | (keys|.[0])')
-MME2E_DC_DASHBOARD_GATEWAY=$(docker network inspect $MME2E_DC_DASHBOARD_NETWORK | jq -r '.[0].IPAM.Config[0].Gateway')
-AUTOMATION_DASHBOARD_URL="http://${MME2E_DC_DASHBOARD_GATEWAY}:4000/api"
+case $MME2E_OSTYPE in
+  darwin )
+    AUTOMATION_DASHBOARD_IP=$(ifconfig $(route get 1.1.1.1 | grep interface | awk '{print $2}') | grep -w inet | awk '{print $2}') ;;
+  * )
+    MME2E_DC_DASHBOARD_NETWORK=$(docker inspect $(${MME2E_DC_DASHBOARD} ps -q dashboard) | jq -r '.[0].NetworkSettings.Networks | (keys|.[0])')
+    AUTOMATION_DASHBOARD_IP=$(docker network inspect $MME2E_DC_DASHBOARD_NETWORK | jq -r '.[0].IPAM.Config[0].Gateway')
+esac
+AUTOMATION_DASHBOARD_URL="http://${AUTOMATION_DASHBOARD_IP}:4000/api"
 
 mme2e_log "Generating a signed JWT token for accessing the dashboard"
-${MME2E_DC_DASHBOARD} exec -T -u $MME2E_UID dashboard npm i
-AUTOMATION_DASHBOARD_TOKEN=$(${MME2E_DC_DASHBOARD} exec -T -u $MME2E_UID dashboard node script/sign.js | awk '{ print $2; }') # The token secret is specified in the dashboard.override.yml file
+${MME2E_DC_DASHBOARD} exec -T dashboard npm i
+AUTOMATION_DASHBOARD_TOKEN=$(${MME2E_DC_DASHBOARD} exec -T dashboard node script/sign.js | awk '{ print $2; }') # The token secret is specified in the dashboard.override.yml file
 
 mme2e_log "Generating the .env.dashboard file, to point Cypress to the dashboard URL"
 mme2e_generate_envfile_from_var_names >.env.dashboard <<EOF