Add guidance in wiki report for Grafana dashboards

Adding a line to Wiki report with the guidance for Grafana credentials for performance environments in 1Password vault.

Related to performance!524 (merged)

changed milestone to %16.4

added Quality maintenancepipelines typemaintenance labels

assigned to @niskhakova

@grantyoung , could you please review?

Example output

Test Links

• Pipeline
• Results History Dashboard
• Docs
• Grafana dashboard login credentials are stored in Engineering 1Password vault under Performance Grafana dashboard credentials

Test Results

• Environment: 10k
• Environment Version: - -
• Date: 2023-08-24

LGTM!

requested review from @grantyoung

approved this merge request

mentioned in commit 835b21b7

merged