DO-1562: let only one comsumer function run to throttle the load on t…

[crispy101]

Description of the proposed changes

• let only one consumer function run to throttle the load on the prerender service recaching the objects

Screenshots (if applicable)

Other solutions considered (if any)

• N/A

Notes to reviewers

• Release version 0.2.4-alpha is available for testing
• Ref.: https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_lambda_nodejs.NodejsFunction.html#reservedconcurrentexecutions

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