cros_build_lib: rename RunCommand to run

This aligns with the new subprocess.run API.

RunCommand -> run.
SudoRunCommand -> sudo_run.
DebugRunCommand -> dbg_run.

BUG=chromium:1006587
TEST=`./run_tests` passes

Change-Id: I78ebd4e08176d7874b3d3fe537b6ceb292b0241b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1818782
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
diff --git a/scripts/cros_sdk_unittest.py b/scripts/cros_sdk_unittest.py
index 1dfca78..aec7a54 100644
--- a/scripts/cros_sdk_unittest.py
+++ b/scripts/cros_sdk_unittest.py
@@ -29,21 +29,21 @@
     """Check for commands from the lvm2 package."""
     with sudo.SudoKeepAlive():
       cmd = ['lvs', '--version']
-      result = cros_build_lib.RunCommand(cmd, error_code_ok=True)
+      result = cros_build_lib.run(cmd, error_code_ok=True)
       self.assertEqual(result.returncode, 0)
 
   def testThinProvisioningToolsPresent(self):
     """Check for commands from the thin-provisioning-tools package."""
     with sudo.SudoKeepAlive():
       cmd = ['thin_check', '-V']
-      result = cros_build_lib.RunCommand(cmd, error_code_ok=True)
+      result = cros_build_lib.run(cmd, error_code_ok=True)
       self.assertEqual(result.returncode, 0)
 
   def testLosetupCommandPresent(self):
     """Check for commands from the mount package."""
     with sudo.SudoKeepAlive():
       cmd = ['losetup', '--help']
-      result = cros_build_lib.RunCommand(cmd, error_code_ok=True)
+      result = cros_build_lib.run(cmd, error_code_ok=True)
       self.assertEqual(result.returncode, 0)
 
 
@@ -74,7 +74,7 @@
     cmd.extend(args)
 
     try:
-      result = cros_build_lib.RunCommand(
+      result = cros_build_lib.run(
           cmd, print_cmd=False, capture_output=True, error_code_ok=True,
           combine_stdout_stderr=True)
     except cros_build_lib.RunCommandError as e: