Disable "Extract symbol packages; if release branch, archive"

[MattGal]

... until it can work. FYI @wtgodbe

[mmitche]

@dotnet-bot test this please

[mmitche]

@dotnet-bot test Windows_NT x64 CoreCLR Perf Tests Correctness
@dotnet-bot test Windows_NT x86 CoreCLR Perf Tests Correctness

[MattGal]

I appreciate the help @mmitche but this was a pipebuild change (i.e. CI tests didn't matter, I thought we didn't want to waste machine's time running them...)

[mmitche]

@MattGal Was just testing some stuff.

[weshaggard]

@MattGal @dagood after disabling this step the "Publish Symbols to Artifact Services" step also fails because it is expecting files from that step. So I disabled all steps in this build definition with commit ce8e4e7 until we figure out the plan. @dagood I assume there is an issue somewhere tracking re-enabling these steps.

[dagood]

https://github.com/dotnet/core-eng/issues/1771 tracks the specific error we see in CoreCLR.

https://github.com/dotnet/core-eng/issues/2073 tracks making the conversion generally more resilient and making it so you can add exceptions rather than blanket enable/disable.

[MattGal]

Thanks @dagood. @weshaggard, my understanding was that all types of publish would be controlled by commonly-named flags which we could then use Conditional Task behaviors to turn off and on as has been done in master. So, once we pick which flag should do that, the change to add conditions to disable all (appropriate) steps at once should be as simple as adding those conditions.