Allow GC to collect unneeded slice elements #14901

Job	Run time
lint	2m 9s
test-concurrent-safe	3m 58s
test-coverage	47s
test-race	2m 6s
compatibility-test (1.23.0, ubuntu-latest, 386)	29s
compatibility-test (1.23.0, ubuntu-latest, amd64)	1m 15s
compatibility-test (1.23.0, otel-linux-arm64, arm64)	32s
compatibility-test (1.23.0, macos-13, amd64)	1m 59s
compatibility-test (1.23.0, macos-latest, arm64)	58s
compatibility-test (1.23.0, windows-latest, 386)	2m 52s
compatibility-test (1.23.0, windows-latest, amd64)	2m 2s
compatibility-test (~1.22.5, ubuntu-latest, 386)	31s
compatibility-test (~1.22.5, ubuntu-latest, amd64)	1m 12s
compatibility-test (~1.22.5, otel-linux-arm64, arm64)	39s
compatibility-test (~1.22.5, macos-13, amd64)	1m 10s
test-bench	33s
compatibility-test (~1.22.5, macos-latest, arm64)	44s
compatibility-test (~1.22.5, windows-latest, 386)	2m 50s
compatibility-test (~1.22.5, windows-latest, amd64)	3m 36s
codecov	7s
test-compatibility	1s
	30m 30s

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