crypto/ed25519: TestEd25519Vectors failures

[gopherbot]

#!watchflakes
default <- pkg == "crypto/ed25519" && test == "TestEd25519Vectors"

Issue created automatically to collect these failures.

Example (log):

--- FAIL: TestEd25519Vectors (10.18s)
    ed25519vectors_test.go:97: failed to run `go mod download -json filippo.io/mostly-harmless/ed25519vectors@v0.0.0-20210322192420-30a2d7243a94`, output: {
        	"Path": "filippo.io/mostly-harmless/ed25519vectors",
        	"Version": "v0.0.0-20210322192420-30a2d7243a94",
        	"Error": "filippo.io/mostly-harmless/ed25519vectors@v0.0.0-20210322192420-30a2d7243a94: Get \"https://proxy.golang.org/filippo.io/mostly-harmless/ed25519vectors/@v/v0.0.0-20210322192420-30a2d7243a94.info\": net/http: TLS handshake timeout"
        }

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "crypto/ed25519" && test == "TestEd25519Vectors"

2023-07-25 01:33 darwin-amd64-longtest go@862fa6d0 crypto/ed25519.TestEd25519Vectors (log)

--- FAIL: TestEd25519Vectors (10.18s)
    ed25519vectors_test.go:97: failed to run `go mod download -json filippo.io/mostly-harmless/ed25519vectors@v0.0.0-20210322192420-30a2d7243a94`, output: {
        	"Path": "filippo.io/mostly-harmless/ed25519vectors",
        	"Version": "v0.0.0-20210322192420-30a2d7243a94",
        	"Error": "filippo.io/mostly-harmless/ed25519vectors@v0.0.0-20210322192420-30a2d7243a94: Get \"https://proxy.golang.org/filippo.io/mostly-harmless/ed25519vectors/@v/v0.0.0-20210322192420-30a2d7243a94.info\": net/http: TLS handshake timeout"
        }

— watchflakes

[bcmills]

This looks like #55162; I'm not sure why it wasn't posted there.

[bcmills]

Duplicate of #55162