CDRIVER-4584 use libmongocrypt 1.8.0-alpha1 (#1253)

* use libmongocrypt 1.8.0-alpha1

* remove use of `mongocrypt_setopt_fle2v2`

Author: kevinAlbs

.evergreen/scripts/compile-libmongocrypt.sh

@@ -5,7 +5,7 @@ compile_libmongocrypt() {
   declare -r mongoc_dir="${2:?}"
   declare -r install_dir="${3:?}"
 
-  git clone -q --depth=1 https://github.com/mongodb/libmongocrypt --branch 1.8.0-alpha0 || return
+  git clone -q --depth=1 https://github.com/mongodb/libmongocrypt --branch 1.8.0-alpha1 || return
 
   declare -a crypt_cmake_flags=(
     "-DMONGOCRYPT_MONGOC_DIR=${mongoc_dir}"

src/libmongoc/src/mongoc/mongoc-crypt.c

@@ -1329,12 +1329,6 @@ _mongoc_crypt_new (const bson_t *kms_providers,
    crypt = bson_malloc0 (sizeof (*crypt));
    crypt->handle = mongocrypt_new ();
 
-   // Enable the QEv2 protocol.
-   if (!mongocrypt_setopt_fle2v2 (crypt->handle, true)) {
-      _crypt_check_error (crypt->handle, error, true);
-      goto fail;
-   }
-
    // Stash away a copy of the user's kmsProviders in case we need to lazily
    // load credentials.
    bson_copy_to (kms_providers, &crypt->kms_providers);