Change license level wording to accomodate "enterprise"

[peterschretlen]

#49474 will add support for the enterprise license type. Currently this license is only used by ECE and ECK, but is not yet recognized in the stack.

In the Kibana docs, we have a few areas that mention a specific list of licenses like

If you are using a Gold or Platinum license, enable reporting in your config/kibana.yml file.

Do we want to consider changing the wording to something like "Gold license or above"

I see the wording "gold or platinum" in at least the following
https://github.com/elastic/kibana/blob/master/docs/canvas/canvas-share-workpad.asciidoc
https://github.com/elastic/kibana/blob/master/docs/management/managing-licenses.asciidoc

[elasticmachine]

Pinging @elastic/kibana-docs (Team:Docs)

[lcawl]

In general, we've tried to move away from having license-specific information in our documentation. Rather, we should direct folks to the subscriptions page as the source of truth.

In the case of the Canvas docs, I think that entire section about creating a PDF is only applicable if you have a license that enables the reporting features. So I think maybe the first step should be removed and instead that section could be qualified with something like this:
"If you have a license that supports the {report-features}, you can create a PDF copy of your workpad that you can save and share outside of Kibana..."

In the case of the "Managing licenses" page, I think that paragraph could benefit from some clarification. I think the reasons for that requirement are more clearly stated here: https://www.elastic.co/guide/en/elasticsearch/reference/master/bootstrap-checks-xpack.html#bootstrap-checks-tls As a quick stop-gap, however, I don't think it hurts to have "gold or higher" or "gold or later" there.

[peterschretlen]

Thanks @lcawl for the suggestions, I like the idea of not mentioning the specific licenses. Those were the only two files I could find that seem affected, I'll make those updates.