fix(profiling): Use different env var for profile session sample rate (#92480)

Author: Zylphrex

src/sentry/utils/sdk.py

@@ -335,7 +335,9 @@ def configure_sdk():
         sentry_saas_transport = None
 
     if settings.SENTRY_CONTINUOUS_PROFILING_ENABLED:
-        sdk_options["profile_session_sample_rate"] = settings.SENTRY_PROFILE_SESSION_SAMPLE_RATE
+        sdk_options["profile_session_sample_rate"] = float(
+            settings.SENTRY_PROFILES_SAMPLE_RATE or 0
+        )
         sdk_options["profile_lifecycle"] = settings.SENTRY_PROFILE_LIFECYCLE
     elif settings.SENTRY_PROFILING_ENABLED:
         sdk_options["profiles_sampler"] = profiles_sampler