minor: skip sessions not supported tests on 8.1+ (#1312)

Author: isabelatkinson

.evergreen/config.yml

@@ -238,7 +238,7 @@ buildvariants:
 
   - name: gcp-kms
     display_name: "GCP KMS"
-    # patchable: false
+    patchable: false
     run_on:
       # The GCP CLI is not available on RHEL/Ubuntu machines.
       - debian11-small

src/test/spec/sessions/sessions_not_supported.rs

@@ -12,9 +12,11 @@ use crate::{
 
 async fn spawn_mongocryptd(name: &str) -> Option<(EventClient, Process)> {
     let util_client = Client::for_test().await;
-    if util_client.server_version_lt(4, 2) {
+    // TODO RUST-1447: unskip on 8.1+
+    if util_client.server_version_lt(4, 2) || util_client.server_version_gte(8, 1) {
         log_uncaptured(format!(
-            "Skipping {name}: cannot spawn mongocryptd due to server version < 4.2"
+            "Skipping {name}: cannot spawn mongocryptd due to server version < 4.2 or server \
+             version >= 8.1"
         ));
         return None;
     }