chore: disable OTEL by default in guard service (#2522)

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## Changes

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Author: NathanFlurry

packages/core/services/cluster/src/workflows/server/install/install_scripts/files/rivet_guard_configure.sh

@@ -15,7 +15,7 @@ After=network-online.target
 ConditionPathExists=/etc/rivet-server/
 
 [Service]
-Environment="RIVET_OTEL_ENABLED=1"
+# OTEL is not enabled by default since it eats memory very quickly
 Environment="RIVET_OTEL_SAMPLER_RATIO=1"
 Environment="RIVET_SERVICE_NAME=guard"
 Environment="RIVET_NAMESPACE=__NAMESPACE__"