Fix parallel merge with new usage of renamed method

[bartonjs]

No description provided.

[Copilot]

Pull Request Overview

This PR fixes a method call to use the renamed ImportSlhDsaPrivateKey method instead of the previously named ImportSlhDsaSecretKey method in the SlhDSA cryptography tests.

• Updates method call to use the correct renamed method
• Ensures tests continue to function after API rename

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[AaronRobinsonMSFT]

@bartonjs If you are confident of this change and it looks correct to me too, I would merge this as soon as one of the legs gets past the current failure.

[PranavSenthilnathan]

/ba-g failing leg passes with these changes

Previous run with error: https://github.com/dotnet/runtime/pull/118232/checks?check_run_id=47144319285
This PR without error: https://github.com/dotnet/runtime/pull/118246/checks?check_run_id=47149214431

[EgorBo]

@bartonjs this PR broke main?

src/libraries/System.Security.Cryptography.Pkcs/tests/SignedCms/SignedCmsTests.cs(1851,48): error CS0117: (NETCORE_ENGINEERING_TELEMETRY=Build) 'SlhDsa' does not contain a definition for 'ImportSlhDsaSecretKey'

[AaronRobinsonMSFT]

@EgorBo No, this PR fixes that.