OpTestKernelDump.py: Cleanup /var/crash for both local and network dumps

Previously, cleanup of crash directories under /var/crash/ was restricted
to local dumps and root user. However, in network-based (SSH/NFS) kdump
scenarios, dump folders are also copied to /var/crash/, so they should be
cleaned up as well. The cleanup logic in the finally block is now updated
to remove crash directories for all cases when dump_server_user is root.

Additionally:
- Added setup_test() and verify_dump_file() support to the
  OpTestMakedump() test case.
- The test now executes setup_test(), triggers a kernel crash, runs
  makedumpcheck, and finally verifies dump files.
- verify_dump_file() also handles cleanup of the crash folder after dump
  verification.
- Addressed scenarios where crash folders are created with the same names
  to ensure reliable dump verification and cleanup.

Signed-off-by: Shirisha G <shirisha@linux.ibm.com>

Author: shirishaganta1

testcases/OpTestKernelDump.py

@@ -308,7 +308,7 @@ def verify_dump_file(self, boot_type=BootType.NORMAL, dump_place="local"):
                 self.c.run_command("ls /var/crash/%s/opalcore*" %
                                    self.crash_content[0])
         finally:
-            if dump_place == "local" and self.dump_server_user == 'root':
+            if self.dump_server_user == 'root':
                 log.info("Cleaning up crash directory /var/crash/%s" % self.crash_content[0])
                 self.c.run_command("rm -rf /var/crash/%s; sync" % self.crash_content[0])
 
@@ -1327,8 +1327,10 @@ def runTest(self):
         obj = OpTestInstallUtil.InstallUtil()
         obj.update_kernel_cmdline(self.distro, remove_args="disable_radix",
                                   reboot=True, reboot_cmd=True)
+        self.setup_test()
         self.kernel_crash()
         self.makedump_check()
+        self.verify_dump_file(boot_type)
 
 
 class KernelCrash_KdumpPMEM(OptestKernelDump):