CI: always require aws-oicd-role-arn input to be set

[bayandin]

Problem

benchmarking job fails because aws-oicd-role-arn input is not set

Summary of changes:

• Set aws-oicd-role-arn for `benchmarking job
• Always require aws-oicd-role-arn to be set
• Rename aws_oicd_role_arn to aws-oicd-role-arn for consistency

[github-actions]

7095 tests run: 6798 passed, 0 failed, 297 skipped (full report)

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Flaky tests (1)

Postgres 17

• test_timeline_archival_chaos: release-arm64

Code coverage* (full report)

• functions: 31.4% (8397 of 26778 functions)
• lines: 48.0% (66620 of 138651 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
4dff20a at 2024-12-13T19:33:31.664Z :recycle:}