Disable NoGC test in GCStress test runs

[BruceForstall]

No description provided.

[BruceForstall]

@dotnet-bot test Windows_NT x64 Checked gcstress0xc_jitstress1
@dotnet-bot test Windows_NT x64 Checked gcstress0xc_jitstress2

[BruceForstall]

cc @dotnet/jit-contrib

[BruceForstall]

infra...

@dotnet-bot test Windows_NT arm64 Cross Checked Innerloop Build and Test

[BruceForstall]

@jashook @RussKeldorph arm64 machine issue?
https://ci.dot.net/job/dotnet_coreclr/job/master/job/arm64_cross_checked_windows_nt_flow_prtest/506/

21:29:08 Building remotely on ARM64-AMD-054 (dtap arm64-windows_nt) in workspace C:\Users\robox\j\workspace\arm64_cross_c---e6cb65c4
21:29:08 [WS-CLEANUP] Deleting project workspace...
21:29:16 
ERROR: [WS-CLEANUP] Cannot delete workspace: remote file operation failed: C:\Users\robox\j\workspace\arm64_cross_c---e6cb65c4 at hudson.remoting.Channel@48852123:JNLP4-connect connection from 131.107.19.121/131.107.19.121:55570: java.io.IOException: Unable to delete 'C:\Users\robox\j\workspace\arm64_cross_c---e6cb65c4\bin\Product\Windows_NT.arm64.Checked\PDB'. Tried 3 times (of a maximum of 3) waiting 0.1 sec between attempts.
21:29:16 ERROR: Cannot delete workspace: remote file operation failed: C:\Users\robox\j\workspace\arm64_cross_c---e6cb65c4 at hudson.remoting.Channel@48852123:JNLP4-connect connection from 131.107.19.121/131.107.19.121:55570: java.io.IOException: Unable to delete 'C:\Users\robox\j\workspace\arm64_cross_c---e6cb65c4\bin\Product\Windows_NT.arm64.Checked\PDB'. Tried 3 times (of a maximum of 3) waiting 0.1 sec between attempts.