mattermost-load-test-ng-v1.16.0-rc1

What's Changed

• Use PostgreSQL 14 in DB parameter groups by @agarciamontoro in #707
• MM-57260: Revert Pyroscope version bump by @agarciamontoro in #709
• MM-57261: Use a valid database engine version for MySQL by @agarciamontoro in #710
• Bump version to v1.15.0-rc2 by @agarciamontoro in #713
• MM-55324: Apply learnings from Mattermost config review by @agarciamontoro in #706
• Bump version to v1.15.0 by @agarciamontoro in #716
• MM-57354: Fetch static assets by @agnivade in #715
• Uniformly load-balance connections across cores by @agnivade in #718
• Add *.tar to the .gitignore by @devinbinnie in #721
• Prevent nginx from flagging temporarily unavailable backends as dead by @streamer45 in #719
• Bumping instance specs to new series by @agnivade in #723
• Acknowledge websocket POSTED events when they should be by @devinbinnie in #722
• MM-57355: Moving to a test service env by @agnivade in #724
• MM-57747: Upgrade nginx and optimize cache config by @agnivade in #726
• Bump version to v1.16.0-rc1 by @agarciamontoro in #728

Full Changelog: v1.15.0...v1.16.0-rc1