[chore][windows][system/process]: ignore error in some cases

[VihasMakwana]

• Enhancement

We can ignore the error in two cases:

• While reading the process executable name.
  • For pid 4, this call fails as we can't access the executable name via the system call. Same for other kernel-level processes.
• While finding the owner for a particular process.
  • We try to open the process token via syscall.OpenProcessTokenand we can't access the token for protected processes , even as an administrator.

it's okay to ignore these errorr and move forward as we can access few other metrics (memory, cpu).

More context here

Relates https://github.com/elastic/beats/issues/40484