client: enable specifying user/group permissions in the template stanza (#13755)
* Adds Uid/Gid parameters to template.
* Updated diff_test
* fixed order
* update jobspec and api
* removed obsolete code
* helper functions for jobspec parse test
* updated documentation
* adjusted API jobs test.
* propagate uid/gid setting to job_endpoint
* adjusted job_endpoint tests
* making uid/gid into pointers
* refactor
* updated documentation
* updated documentation
* Update client/allocrunner/taskrunner/template/template_test.go
Co-authored-by: Luiz Aoqui <luiz@hashicorp.com>
* Update website/content/api-docs/json-jobs.mdx
Co-authored-by: Luiz Aoqui <luiz@hashicorp.com>
* propagating documentation change from Luiz
* formatting
* changelog entry
* changed changelog entry
Co-authored-by: Luiz Aoqui <luiz@hashicorp.com>
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