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- When `libcurl` is installed in path out of default path, like on
Windows, `include_directories` failed to find `curl/curl.h`.
- Fix `cmake` by using modern syntax with imported target and
`find_package`
- Fix warnings treated as the errors
  - Remove `HASHICORP_HAVE_EXCEPTIONS` macro and related code
- Add package to `Server` component in Windows
- Tested with `$ ./mysql-test/mtr --suite=vault`
- Closes PR #3068
- Reviewer: <wlad@mariadb.com>
            <julius.goryavsky@mariadb.com>