cmake: reflect changes with CURL_USE_OPENLDAP

The commit "cmake: improve OpenLDAP builds" [1][2] in Curl deletes CMake
option CURL_USE_OPENLDAP.

The patch reflects this change in Tarantool's build infrastructure.

1. https://github.com/curl/curl/commit/751e168d93b4a58f3fbbe2908c0041ae2f934329
2. https://github.com/curl/curl/pull/12024

Follows up #9086

NO_CHANGELOG=third_party
NO_DOC=third_party
NO_TEST=third_party

cmake/BuildLibCURL.cmake

@@ -179,7 +179,6 @@ macro(curl_build)
     list(APPEND LIBCURL_CMAKE_FLAGS "-DCURL_USE_GSSAPI=OFF")
     list(APPEND LIBCURL_CMAKE_FLAGS "-DCURL_USE_LIBSSH=OFF")
     list(APPEND LIBCURL_CMAKE_FLAGS "-DCURL_USE_LIBPSL=OFF")
-    list(APPEND LIBCURL_CMAKE_FLAGS "-DCURL_USE_OPENLDAP=OFF")
     list(APPEND LIBCURL_CMAKE_FLAGS "-DCURL_WERROR=OFF")
     # CURL_ZSTD adds zstd encoding/decoding support. Tuning libcurl's build to
     # catch the symbols may require extra work.