CLD-798 Add support for MM_ENV, various fixes (#26616)

* Add support for MM_ENV, various fixes
* Fix workflow template
* Fix reporting steps ordering
* Fix typo
* Improve state check message description
* Fix workflow syntax
* Fix fulltest variable generation
* Fix PR_NUMBER variable usage
* Fix BUILD_ID, add dashboard URL to status check
* Fix automation dashboard URL

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Co-authored-by: Mattermost Build <build@mattermost.com>

e2e-tests/Makefile

@@ -1,7 +1,3 @@
-# Load environment variables from .env file
--include .ci/.env
-export
-
 SHELL := /bin/bash
 
 .PHONY: all run stop clean