automate upgrade steps to 2.0

[vdelendik]

analyze changes and organize upgrade script. CE: https://github.com/zebrunner/community-edition/pull/505/files DONE: nginx/conf.d/default.conf.original

jenkins: https://github.com/zebrunner/jenkins-master/pull/365/files - add pipeline version update as readme step! variables.env.original

mcloud: https://github.com/zebrunner/mcloud/pull/121/files .env.original configuration/stf-proxy/nginx.conf.original variables.env.original

reporting: https://github.com/zebrunner/reporting/pull/2337/files DONE: .env.original

selenoid: https://github.com/zebrunner/selenoid/pull/38/files DONE: .env.original

sonarqube: N/A

[vdelendik]

done. @okamara, please move to Done if it is successfully tested on your side.

[ghost]

Verified, fixed.