Added OpenAPI response structures for sys endpoints (#18515)

* added response objects to all of the endpoints laid out by the ticket linked

* added changelog file and updated based on review

* added the required bool to the correct fields

* Update vault/logical_system_paths.go

Co-authored-by: Daniel Huckins <dhuckins@users.noreply.github.com>

* Update vault/logical_system_paths.go

Co-authored-by: Daniel Huckins <dhuckins@users.noreply.github.com>

* Update vault/logical_system_paths.go

Co-authored-by: Daniel Huckins <dhuckins@users.noreply.github.com>

* Update vault/logical_system_paths.go

Co-authored-by: Daniel Huckins <dhuckins@users.noreply.github.com>

* Update vault/logical_system_paths.go

Co-authored-by: Daniel Huckins <dhuckins@users.noreply.github.com>

* Update vault/logical_system_paths.go

Co-authored-by: Daniel Huckins <dhuckins@users.noreply.github.com>

* Update vault/logical_system_paths.go

Co-authored-by: Daniel Huckins <dhuckins@users.noreply.github.com>

* updated based on review

* Update vault/logical_system_paths.go

Co-authored-by: Daniel Huckins <dhuckins@users.noreply.github.com>

* Update vault/logical_system_paths.go

Co-authored-by: Daniel Huckins <dhuckins@users.noreply.github.com>

* updated based on review and added test cases for validating response structures

* fix copy pasta issues breaking tests

* Update vault/logical_system_paths.go

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* fix test failures

* fixed issue with refrencing the wrong req var name

* fixed another test case and double checked the rest

* updated based on review

* updated in all locations

* Update vault/logical_system_paths.go

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* Update vault/logical_system_paths.go

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* fixed my brain fart

* Update vault/logical_system_paths.go

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* address fmt error

---------

Co-authored-by: lursu <leland.ursu@hashicorp.com>
Co-authored-by: Daniel Huckins <dhuckins@users.noreply.github.com>
Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

changelog/18515.txt

@@ -0,0 +1,3 @@
+```release-note:improvement
+openapi: Add openapi response definitions to vault/logical_system_paths.go defined endpoints.
+```