[ENH] Move Vault secrets and provider auth to custom action

[viniciusdc]

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[marcelovilla]

@viniciusdc is this ready for review? Is there an associated issue?

[marcelovilla]

@viniciusdc with Vault failing relatively frequently, I'm wondering if we should consider just using GitHub secrets instead. Any thoughts?

C.C. @Adam-D-Lewis @dcmcand

[dcmcand]

I would be in favor of moving away from vault

[marcelovilla]

I opened #2835

[marcelovilla]

We're going to address #2835 so we won't be merging this PR