RFC30: Compile time benchmark (#2617)

## Motivation and Context
This PR implements ci-script for bench marking compile time.
Results are turned into a markdown file and compile time is normalized
to a value relative to the compile time of S3's sdk on dev profile
without any features.

Benchmark is triggered for every PR.

I considered using AWS batch, however, I decided not to move forward
with for following reasons
- I do not have access to your AWS account, thus making the debugging
extremely difficult
- Fork's github action will always fail if you block access

## Testing
NA

## Checklist
- [ ] I have updated `CHANGELOG.next.toml` if I made changes to the
smithy-rs codegen or runtime crates
- [ ] I have updated `CHANGELOG.next.toml` if I made changes to the AWS
SDK, generated SDK code, or SDK runtime crates

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_By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice._

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Co-authored-by: Zelda Hessler <zhessler@amazon.com>