Adding C++ benchmarks #94

[AtulRajput01]

1.Added C++ benchmark for AWS Lambda
2.Implemented C++ benchmark using the benchmark library and AWS SDK for Lambda
3.Created a setup function to compile and run the C++ benchmark, and to create, invoke and delete a Lambda function
4.Stored the benchmark results in a map and printed the results for comparison between local and AWS Lambda runtimes
5.Tested the C++ benchmark on AWS Lambda to ensure accuracy and reproducibility

[AtulRajput01]

Associated with #94

[mcopik]

@AtulRajput01

• Did you notice there is an ongoing PR Add support for C++ benchmarks. #99 working towards the issue C++ benchmarks #94? The PR implements generic support to build different C++ serverless benchmarks, link dependencies, deploy, and execute.
• Your solution seems to be a C++ file that manually compiles a C++ file and then tries to run it as a Lambda function. What's the purpose of that? What can we learn from such a benchmark?
• The benchmark is also not added according to the directory structure of benchmarks.
• The PR is missing the benchmark file itself - it just includes a file running a hardcoded g++ command to compile a missing benchmark function.

I'm voting to close this PR unless we get a better understanding of the purpose of this benchmark.