* VAULT-2285 adding capability to accept comma separated entries for auth enable/tune
* Adding changelog
* Adding logic to detect invalid input parameter for auth enable config
* Updating tune.mdx
* Updating secret enable/tune for comma separated parameters
* Adding further parameter checks for auth/secret tests
Fixing changelog
using builtin type for a switch statement
Fixing a possible panic scenario
* Changing a function name, using deep.Equal instead of what reflect package provides
* Fixing auth/secret enable/tune mdx files
* One more mdx file fix
* Only when users provide a single comma separated string in a curl command, split the entries by commas
* Fixing API docs for auth/mount enable/tune for comma separated entries
* updating docs, removing an unnecessary switch case
