Update CC docs (#14714)

* Update CC docs

* Add sample response

* Address review feedback

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Meggie <meggie@hashicorp.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Update website/content/api-docs/system/internal-counters.mdx

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>

* Minor edits

* Update partial month API

Co-authored-by: Loann Le <84412881+taoism4504@users.noreply.github.com>
Co-authored-by: Meggie <meggie@hashicorp.com>