bpo-43631: Update to OpenSSL 1.1.1k (GH-25024)



- [x] Build OpenSSL 1.1.1k for macOS
- [x] Build OpenSSL 1.1.1k for Windows

I have also updated multissl tester and various CI configurations to use latest OpenSSL. The versions were all over the place.

Signed-off-by: Christian Heimes <christian@python.org>

Automerge-Triggered-By: GH:tiran
diff --git a/Tools/ssl/multissltests.py b/Tools/ssl/multissltests.py
index 7afa1ee..598503f 100755
--- a/Tools/ssl/multissltests.py
+++ b/Tools/ssl/multissltests.py
@@ -48,7 +48,7 @@
 ]
 
 OPENSSL_RECENT_VERSIONS = [
-    "1.1.1j",
+    "1.1.1k",
     # "3.0.0-alpha12"
 ]