fix: Only use major OS version in Apple symbol stats (#78765)

Using the full OS version has a very high cardinality, so we truncate at
the first `.` to get just the major version.

src/sentry/lang/native/processing.py

@@ -486,6 +486,9 @@ def emit_apple_symbol_stats(apple_symbol_stats, data):
     )
     os_version = get_path(data, "contexts", "os", "version")
 
+    if os_version:
+        os_version = os_version.split(".", 1)[0]
+
     if neither := apple_symbol_stats.get("neither"):
         metrics.incr(
             "apple_symbol_availability_v2",