Increase OTEL_BSP_SCHEDULE_DELAY (temporalio#7520)

## What changed?
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Increased OTEL_BSP_SCHEDULE_DELAY from 0 to 100ms.

## Why?
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Zero is too aggressive and leads to too much CPU usage.

## How did you test it?
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test? Checked in staging env? -->

## Potential risks
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## Documentation
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Author: stephanos

Makefile

@@ -74,7 +74,7 @@ GOINSTALL := GOBIN=$(ROOT)/$(LOCALBIN) go install
 
 OTEL ?= false
 ifeq ($(OTEL),true)
-	export OTEL_BSP_SCHEDULE_DELAY=0
+	export OTEL_BSP_SCHEDULE_DELAY=100 # in ms
 	export OTEL_EXPORTER_OTLP_TRACES_INSECURE=true
 	export OTEL_TRACES_EXPORTER=otlp
 	export TEMPORAL_OTEL_DEBUG=true

docs/development/testing.md

@@ -97,7 +97,7 @@ will ultimately fail the test.
 To debug your test by analysing observability traces, set the following environment variables:
 
 ```bash
-export OTEL_BSP_SCHEDULE_DELAY=0
+export OTEL_BSP_SCHEDULE_DELAY=100
 export OTEL_EXPORTER_OTLP_TRACES_INSECURE=true
 export OTEL_TRACES_EXPORTER=otlp
 export TEMPORAL_OTEL_DEBUG=true