Add process management code in libbeat under Apache license

[belimawr]

This change is needed because we need to use the same code in the oss part of Filebeat, the following PR needs this job management: https://github.com/elastic/beats/pull/43368

Proposed commit message

Move/update the code from x-pack/libbeat/common/proc/job_windows.go, now it lives in libbeat/common/proc/proc_win.go and libbeat/common/proc/proc.go and contains some updates.

Osquerybeat is updated to import the new package

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] ~~I have made corresponding changes to the documentation~~
• [ ] ~~I have made corresponding change to the default configuration files~~
• [ ] ~~I have added tests that prove my fix is effective or that my feature works~~
• [ ] I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

~~## Disruptive User Impact~~ ~~## Author's Checklist~~ ~~## How to test this PR locally~~

Related issues

• https://github.com/elastic/beats/pull/43368

~~## Use cases~~ ~~## Screenshots~~ ~~## Logs~~

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[mergify[bot]]

This pull request does not have a backport label. If this is a bug or security fix, could you label this PR @belimawr? 🙏. For such, you'll need to label your PR with:

• The upcoming major version of the Elastic Stack
• The upcoming minor version of the Elastic Stack (if you're not pushing a breaking change)

To fixup this pull request, you need to add the backport labels for the needed branches, such as:

• backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.

[elasticmachine]

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)

[elasticmachine]

Pinging @elastic/sec-deployment-and-devices (Team:Security-Deployment and Devices)