✨ Add support for profile selection in clusterawsadm bootstrap credentials encode-as-profile

[v47]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Currently, clusterawsadm bootstrap credentials encode-as-profile only works with the default AWS profile. This limitation makes it inconvenient to use the tool in environments that rely on multiple named profiles, reducing its effectiveness for generating AWS_B64ENCODED_CREDENTIALS.

Special notes for your reviewer:

Checklist:

• squashed commits
• includes documentation
• includes emoji in title
• adds unit tests
• adds or updates e2e tests

Release note:

NONE

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: v47 / name: victor vergunov (95c8f7f)

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