Close the lambda's after limit is reached using DynamoDB event

[MehulKChaudhari]

Issue Description

Now we set the reserved concurrency of Lambda's using code. But what we want is the reserved concurrency should be set zero if the pendingLimit is set zero as a side effect of it.

Current Behavior

Now we set the reserved concurrency of Lambda's using code.

Reproducibility

• [x] This issue is reproducible
• [ ] This issue is not reproducible

Steps to Reproduce

1. Open the repository
2. check the file rateLimiterLambda/main.go

Severity/Priority

• [ ] Critical
• [ ] High
• [x] Medium
• [ ] Low

Checklist

• [x] I have read and followed the project's code of conduct.
• [x] I have searched for similar issues before creating this one.
• [x] I have provided all the necessary information to understand and reproduce the issue.
• [x] I am willing to contribute to the resolution of this issue.