Add keepalive configs as templated strings and modify their values

[JDPrabasha]

Purpose

Lower the 5-minute interval to check for liveness of adapter after establishing a connection to it to 1 minute. This would allow for faster detection when the local adapter goes down and enable faster switching to another replica. Additionally, by making these values dynamically configurable, we can adjust them as and when needed in the future.

Issues

Fixes https://github.com/wso2-enterprise/choreo/issues/32445

Automation tests

• Unit tests added: No
• Integration tests added: No

Tested environments

Not Tested

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Maintainers: Check before merge

• Assigned 'Type' label
• Assigned the project
• Validated respective github issues
• Assigned milestone to the github issue(s)