cmake: reflect changes with CURL_USE_OPENLDAP

The commit 751e168d93b4a58f3fbbe2908c0041ae2f934329 ("cmake: improve
OpenLDAP builds") [1][2] in Curl deletes CMake option CURL_USE_OPENLDAP.

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

1. curl/curl@751e168
2. curl/curl#12024

Follows up tarantool#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.