Follow-up to earlier commit to change label to 8-core

Summary:
X-link: https://github.com/facebookincubator/zstrong/pull/1086

Discussed with Opensource team further. 4-core-ubuntu-22.04 label does not work since it does not exist and runners can work only with the allocated list of labels.

Opensource team has now added necessary label, is added for 8-core as requested. So, now making code change for good, hopefully!

https://fb.workplace.com/groups/osssupport/permalink/27367197886235467/

Reviewed By: xiangxu1121

Differential Revision: D66487987

fbshipit-source-id: 62fa2b60b5613876aaa1f0c1a47dde8826746926

build/fbcode_builder/getdeps.py

@@ -1021,6 +1021,8 @@ class GenerateGitHubActionsCmd(ProjectCmdBase):
         if build_opts.is_linux():
             artifacts = "linux"
             runs_on = f"ubuntu-{args.ubuntu_version}"
+            if args.cpu_cores:
+                runs_on = f"{args.cpu_cores}-core-ubuntu-{args.ubuntu_version}"
         elif build_opts.is_windows():
             artifacts = "windows"
             runs_on = "windows-2019"
@@ -1272,6 +1274,10 @@ jobs:
         parser.add_argument(
             "--ubuntu-version", default="22.04", help="Version of Ubuntu to use"
         )
+        parser.add_argument(
+            "--cpu-cores",
+            help="Number of CPU cores to use (applicable for Linux OS)",
+        )
         parser.add_argument(
             "--cron",
             help="Specify that the job runs on a cron schedule instead of on pushes",