azblob isn't lint-free with Go 1.20

[jhendrixMSFT]

service/client.go:30:2: field `ClientOptions` is unused (unused)
	azcore.ClientOptions
	^
blob/retry_reader_test.go:47:9: SA1019: rand.Read has been deprecated since Go 1.20 because it shouldn't be used: For almost all use cases, crypto/rand.Read is more appropriate. (staticcheck)
	_, _ = rand.Read(perByteReader.RandomBytes)
	       ^
blob/retry_reader_test.go:389:10: SA1019: rand.Read has been deprecated since Go 1.20 because it shouldn't be used: For almost all use cases, crypto/rand.Read is more appropriate. (staticcheck)
		_, _ = rand.Read(randBytes)