Escape exemplar keys to fix invalid key errors (#5995) #2177

Job	Run time
lint	2m 42s
compatibility-test (1.23.0, ubuntu-latest, 386)	1m 12s
compatibility-test (1.23.0, ubuntu-latest, amd64)	1m 15s
test-bench	59s
compatibility-test (1.23.0, otel-linux-arm64, arm64)	1s
compatibility-test (1.23.0, macos-13, amd64)	1m 52s
test-concurrent-safe	3m 57s
compatibility-test (1.23.0, macos-latest, arm64)	1m 26s
compatibility-test (1.23.0, windows-latest, 386)	2m 20s
compatibility-test (1.23.0, windows-latest, amd64)	2m 24s
test-coverage	1m 15s
compatibility-test (~1.22.5, ubuntu-latest, 386)	1m 2s
compatibility-test (~1.22.5, ubuntu-latest, amd64)	1m 5s
compatibility-test (~1.22.5, otel-linux-arm64, arm64)	1s
test-race	2m 5s
compatibility-test (~1.22.5, macos-13, amd64)	1m 26s
compatibility-test (~1.22.5, macos-latest, arm64)	1m 14s
compatibility-test (~1.22.5, windows-latest, 386)	3m 31s
compatibility-test (~1.22.5, windows-latest, amd64)	4m 20s
codecov	6s
test-compatibility	1s
	34m 14s

Provide feedback