Add a file reloading feature to Logcollector

[vikman90]

This closes #2018.

This PR aims to introduce a file reloading feature during the file checking stage in Logcollector.

This option fixes two problems in agents monitoring files in shared folders on VMware:

1. In Linux agents, the vmhgfs file system cannot update the file inode while it is open. Logcollector would stop following a file if it is rotated.
2. In Windows agents, the shared folder system cannot even update the file contents while it's open by Logcollector. This would prevent the file from being monitored.