SourceLink tests fail for `Microsoft.CodeAnalysis.VisualBasic.Features.pdb` in centos.10

[ellahathaway]

SourcelinkTests.VerifySourcelinks fails during offline validation of the CentOS source-built SDK.

Build: https://dev.azure.com/dnceng/internal/_build/results?buildId=2919061
Stage: SB_CentOSStream10_Offline_CurrentSourceBuiltSdk_Validation_x64

[xUnit.net 00:02:20.78]     Microsoft.DotNet.SourceBuild.Tests.SourcelinkTests.VerifySourcelinks [FAIL]
[xUnit.net 00:02:20.78]         Sourcelink verification failed for the following files:
[xUnit.net 00:02:20.78]         /__w/1/s/artifacts/bin/.../roslyn/obj/Microsoft.CodeAnalysis.VisualBasic.Features/Release/net11.0/Microsoft.CodeAnalysis.VisualBasic.Features.pdb

[ellahathaway]

This isn't reproing locally. dotnet/dotnet#5249 should help determine what's happening with these failures if they occur again. Keeping this issue open for now to see if the error occurs again in CI.