Update aws sdk code from v1 to v2

[dims]

Tested the method getS3Bucket locally using work credentials (empty s3Credentials essentially)

had to update gocloud.dev/blob to a version that supports aws sdk v2

xref: #212

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[dims]

cc @micahhausler

[dims]

/assign @stevekuznetsov @krzyzacy

[krzyzacy]

/hold

do you also need to update the underlying job configs? (not too familiar with aws sdk :-) )

[dims]

@krzyzacy we use a custom format for the creds config - https://github.com/dims/prow/blob/b21d1cf485474d6da2623ccc40849e2c8b24b2e5/pkg/io/providers/providers.go#L97-L107

So i don't think we need any changes in the job configs (famous last words!)

[petr-muller]

LGTM

Sounds like something that should be merged when k8s Prow admins are aware and can report back any issues.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dims, krzyzacy, petr-muller

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[dims]

@petr-muller @krzyzacy i am one of the folks who keep an eye on things failing. want to land this (and happy to revert immediately if anything fails). I am NOT at kubecon as well, might as well do this exercise before folks return from there.

[krzyzacy]

lol sorry I meant to let you unhold yourself, but

/unhold