Add riscv64 arch #1248

Job	Run time
CI - OTLP - GoReleaser / check-goreleaser (linux, arm64)	1m 31s
CI - OTLP - GoReleaser / check-goreleaser (linux, ppc64le)	1m 34s
CI - OTLP - GoReleaser / check-goreleaser (linux, amd64)	1m 25s
CI - OTLP - GoReleaser / check-goreleaser (linux, 386)	1m 47s
CI - OTLP - GoReleaser / check-goreleaser (linux, s390x)	1m 44s
CI - OTLP - GoReleaser / check-goreleaser (windows, 386)	1m 48s
CI - OTLP - GoReleaser / check-goreleaser (linux, riscv64)	1m 37s
CI - OTLP - GoReleaser / check-goreleaser (darwin, arm64)	1m 35s
CI - OTLP - GoReleaser / check-goreleaser (linux, arm)	1m 30s
CI - OTLP - GoReleaser / check-goreleaser (darwin, amd64)	1m 30s
CI - OTLP - GoReleaser / check-goreleaser (windows, amd64)	1m 42s
CI - OTLP - GoReleaser / docker-tests (linux, arm)	29s
CI - OTLP - GoReleaser / docker-tests (linux, ppc64le)	29s
CI - OTLP - GoReleaser / docker-tests (linux, 386)	29s
CI - OTLP - GoReleaser / docker-tests (linux, s390x)	21s
CI - OTLP - GoReleaser / docker-tests (linux, amd64)	25s
CI - OTLP - GoReleaser / docker-tests (linux, riscv64)	20s
CI - OTLP - GoReleaser / docker-tests (linux, arm64)	22s
	20m 38s

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