[fix](fe) Fix IAM role auth not working in S3 FS #62584

[w41ter]

pick #62584

[w41ter]

run buildall

[w41ter]

/review

[Thearas]

Thank you for your contribution to Apache Doris.
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Please clearly describe your PR:

1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
3. What features were added. Why was this function added?
4. Which code was refactored and why was this part of the code refactored?
5. Which functions were optimized and what is the difference before and after the optimization?

[w41ter]

run buildall

[w41ter]

@copilot review this PR

[github-actions]

Buildability: blocking. now calls in two constructors, but that helper is not defined anywhere in , so FE will not compile as submitted.\n\nCorrectness: blocked by the compile failure above. I traced the touched stage/internal-stage and meta-service paths and did not find another distinct blocker in this PR beyond that missing method.\n\nCompatibility: no additional user-provided review focus was supplied.\n\nTests: the new unit test is directionally useful for static-vs-assume-role provider selection, but it cannot catch the current compile break and does not exercise the full stage flow end to end.

[github-actions]

getCredProviderType(objectStoreInfoPB) is used here and again in the private ObjectInfo(ObjectStoreInfoPB, ...) constructor below, but there is no helper with that name in RemoteBase. As written, FE will not compile. Please either add the missing helper or inline the enum extraction in both places before merging.

[github-actions]

Review note: the submitted REQUEST_CHANGES summary body was shell-mangled by backticks in the automation wrapper. The intended summary is:\n\nBuildability: blocking. RemoteBase.ObjectInfo now calls getCredProviderType(...) in two constructors, but that helper is not defined anywhere in RemoteBase, so FE will not compile as submitted.\n\nCorrectness: blocked by the compile failure above. I traced the touched stage/internal-stage and meta-service paths and did not find another distinct blocker in this PR beyond that missing method.\n\nCompatibility: no additional user-provided review focus was supplied.\n\nTests: the new unit test is directionally useful for static-vs-assume-role provider selection, but it cannot catch the current compile break and does not exercise the full stage flow end to end.

[w41ter]

run buildall

[hello-stephen]

FE Regression Coverage Report

Increment line coverage 0.00% (0/60) 🎉
Increment coverage report
Complete coverage report

[wyxxxcat]

@wyxxxcat need support more credential provider type after this pr merged

[github-actions]

PR approved by at least one committer and no changes requested.

[yiguolei]

run buildall

[morningman]

run buildall

[hello-stephen]

FE Regression Coverage Report

Increment line coverage 13.33% (8/60) 🎉
Increment coverage report
Complete coverage report

[yiguolei]

skip buildall

ok