Remove github release workflow

I will revert to producing the github release binaries manually
for now, so I can create binaries that run on OS releases older
than the currently-supported github-hosted runners.

Upgrade github.com/mostynb/go-grpc-compression to avoid decompression…

… bomb DoS

mostynb/go-grpc-compression#27

Build container image with clang-17 on arm64

Go fmt

Test /metrics with basic-auth and mTLS

Upgrade to go 1.20.1

The distroless nossl images are no longer in preview

[azblobproxy] report an error when client id is required but not set

[disk] limit the number of concurrent file removals even more on mac

This also adds a startup log line mentioning the value, to help debugging.

This might avoid #554.

Make remoteHTTPProxyCache.Contains do HEAD request

As only headers and response status are important and body is ignored
doing http HEAD will save some network.

Signed-off-by: Anton Tiurin <atiurin@proton.me>