pulling short lived AWS keys into their own thing, fixes #1224

[dylanTruffle]

Description:

Splits out short lived AWS tokens into its own detector.

Checklist:

• Tests passing (make test-community)?
• Lint passing (make lint this requires golangci-lint)?

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✅ dylanTruffle
✅ zricethezav
❌ Chair

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[dylanTruffle]

these keys are short lived by nature, but you can generate them with:

aws sts get-session-token --duration-seconds 36000