Removes `testenv` annotations and related code. These annotations originally let you skip x-pack snippet tests in the docs. However, that's no longer possible.
Relates to #79309, #31619
Changes:
* Removes several `[testenv="gold+"]` attributes from the docs. `gold+` is not a valid [subscription level](https://www.elastic.co/subscriptions) or testenv value.
* Moves two `[testenv="basic"]` attributes to the file header. This makes the `testenv` placement consistent and fixes the yml file generated from `docs/reference/snapshot-restore/register-repository.asciidoc`.
Co-authored-by: James Rodewig <40268737+jrodewig@users.noreply.github.com>
* document ODBC's extra connection string parameters
Document the connection string parameters that are currently not
configurable from the GUI.
Add a note about SmartScreen possible warning on driver MSI
installation.
Add a note about the TLS certificate file not being supported as bundled
or password-protected.
* rephrasing and restructuring the list of params
- addressing PR review notes
* rephrasings and reference linking
- addressing PR review notes
