Support AWS pod identity

[truongnht]

Is your feature request related to a problem? Please describe.
Current release of fluent-bit (2.2.2) does not support pod identity way of retrieving credentials.

Describe the solution you'd like
To use fluent-bit with pod-identity feature, aws sdk needs to be at required minimum version describe here
n/a

Describe alternatives you've considered
n/a

Additional context
n/a

[voidlily]

Still affected on 3.0.4, haven't tested 3.0.6

[truongnht]

If you compare 3.0.4 and 3.0.6, there is no difference in that related area, so it should yield the same result, unfortunately

[voidlily]

https://github.com/fluent/fluent-bit/blob/master/src/aws/flb_aws_credentials_sts.c if i'm reading this right, fluent-bit implements its own AWS SDK in C so it might not be as straightforward as a version bump to implement this

[github-actions]

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[voidlily]

#9206

[ohookins]

Super keen to get this supported.