Aws Lambda cost calculation improvements

[Azanul]

Problem

AWS Lambda costs were off by ~1000x magnitude.

Solution

The calculation for duration was off, it needed to bed divided by 1024 to get correct units.

Changes Made

• Added common utils for AWS cost calculations
• Fixed AWS Lambda cost calculation
• Took free tier into account

Notes

• Pay more attention towards the common utils as, if correctly implemented, these can be used throughout aws provider.

Checklist

• Code follows the contributing guidelines
• Changes have been thoroughly tested
• Documentation has been updated, if necessary
• Any dependencies have been added to the project, if necessary

[Traxmaxx]

hey @Azanul

Pay more attention towards the common utils as, if correctly implemented, these can be used throughout aws provider.

I 100% agree with you, thanks for pointing that out! Do you mind adding a test for this particular util to make sure this does not happen again? There is an example test here

Only if it's doable though! Thanks for your contribution 🙂 🙏

[Azanul]

@Traxmaxx great suggestion! I've added the tests, although not exhaustive. While writing the tests, I found a mistake I did as well!

[mlabouardy]

Thanks a million @Azanul