release/2.19.1 config fix

[samsondav]

• Bump version and update CHANGELOG for core v2.19.1, this is a custom unofficial release to unblock data streams for testing purposes
• Disable debug+info logs by default for legacy mercury jobs (Disable debug+info logs by default for legacy mercury jobs #15771)
• Fix restore of config in blue-green mode

Requires

Supports

[github-actions]

I see you added a changeset file but it does not contain a tag. Please edit the text include at least one of the following tags:

• #added For any new functionality added.
• #breaking_change For any functionality that requires manual action for the node to boot.
• #bugfix For bug fixes.
• #changed For any change to the existing functionality.
• #db_update For any feature that introduces updates to database schema.
• #deprecation_notice For any upcoming deprecation functionality.
• #internal For changesets that need to be excluded from the final changelog.
• #nops For any feature that is NOP facing and needs to be in the official Release Notes for the release.
• #removed For any functionality/config that is removed.
• #updated For any functionality that is updated.
• #wip For any change that is not ready yet and external communication about it should be held off till it is feature complete.

🎖️ No JIRA issue number found in: PR title, commit message, or branch name. Please include the issue ID in one of these.

[cl-sonarqube-production]

Quality Gate failed

Failed conditions
C Security Rating on New Code (required ≥ A)

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