Bump go.opentelemetry.io/collector/exporter/otlpexporter from 0.136.0 to 0.137.0 #6114

Job	Run time
Performance Tests	11m 40s
Unit tests with race condition detection	7m 25s
Unit Tests	6m 53s
Lint	6m 46s
Build Unsigned Snapshot	6m 20s
Proxy Sanity Check	0s
Load Tests	0s
Upgrade Tests (redhatenterprise, 9)	4m 50s
Integration Tests (alpine, 3.22)	5m 55s
Integration Tests (redhatenterprise, 9)	7m 25s
Upgrade Tests (alpine, 3.22)	3m 29s
Upgrade Tests (ubuntu, 24.04)	4m 15s
Integration Tests (ubuntu, 24.04)	7m 10s
Metrics Integration Tests - Official Plus Images	0s
Integration Tests - Official Plus Images	0s
Integration Tests - Official OSS Images	0s
Metrics Integration Tests - Official OSS Images	0s
	1h 12m 8s

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