[lldb/Test] Update TestProcessList.py for reproducer replay

Because LLDB isn't the one spawning the subprocess, the PID is different
during replay. Exclude it form the substring check during replay.

Depends on D79646 to pass with reproducer replay.

lldb/packages/Python/lldbsuite/test/configuration.py

@@ -160,3 +160,9 @@ def get_filecheck_path():
     """
     if filecheck and os.path.lexists(filecheck):
         return filecheck
+
+def is_reproducer_replay():
+    """
+    Returns true when test is replayed from a reproducer.
+    """
+    return replay_path is not None

lldb/test/API/commands/platform/process/list/TestProcessList.py

@@ -3,7 +3,6 @@ Test process list.
 """
 
 
-
 import os
 import lldb
 import shutil
@@ -18,7 +17,7 @@ class ProcessListTestCase(TestBase):
 
     NO_DEBUG_INFO_TESTCASE = True
 
-    @skipIfWindows # https://bugs.llvm.org/show_bug.cgi?id=43702
+    @skipIfWindows  # https://bugs.llvm.org/show_bug.cgi?id=43702
     def test_process_list_with_args(self):
         """Test process list show process args"""
         self.build()
@@ -28,5 +27,11 @@ class ProcessListTestCase(TestBase):
         popen = self.spawnSubprocess(exe, args=["arg1", "--arg2", "arg3"])
         self.addTearDownHook(self.cleanupSubprocesses)
 
-        self.expect("platform process list -v",
-                    substrs=[str(popen.pid), "TestProcess arg1 --arg2 arg3"])
+        substrs = [str(popen.pid), "TestProcess arg1 --arg2 arg3"]
+
+        # Because LLDB isn't the one spawning the subprocess, the PID will be
+        # different during replay.
+        if configuration.is_reproducer_replay():
+            substrs.pop(0)
+
+        self.expect("platform process list -v", substrs=substrs)