[Portuguese] Update definitions from original content to dev-pt

[edsoncelio]

Issue to track the changes in the branch dev-pt compared to main branch

Last update: 14 August 2022

Definitions updated

• content/en/blue-green-deployment.md
• content/en/cluster.md
• content/en/distributed-apps.md
• content/en/observability.md
• content/en/site-reliability-engineering.md
• content/en/virtualization.md

Metadata updated

• CODEOWNERS
• LOCALIZATION.md