scheduler: fix panic when preempting and evicting allocs

drivers: always initialize taskHandle.logger

[ci skip]

Changelog updates and download link for 0.10.2-rc1

There's a bug in version parsing that breaks this constraint when using
a prerelease enterprise version of Vault (eg 1.3.0-beta1+ent). While
this does not fix the underlying bug it does provide a workaround for
future issues related to the implicit constraint. Like the implicit
Connect constraint: *all* implicit constraints should be overridable to
allow users to workaround bugs or other factors should the need arise.

This is the basic code to add the Windows Service Manager hooks to Nomad.

Includes vendoring golang.org/x/sys/windows/svc and added Docs:
* guide for installing as a windows service.
* configuration for logging to file from PR #6429

Co-Authored-By: Michael Schurter <mschurter@hashicorp.com>

update CHANGELOG

Remove 0.10.1 release date until finalizing release