pkg/parca: Add --http-read-timeout and --http-write-timeout options

[quite4work]

Hi,

I had troubles with loading debug information of a big Rust binary (~1.2Gb).
Because debug information wasn't loaded, there were no function names in the samples.

Every time the upload failed after 5 seconds with following error:

{
  "caller": "server.go:321",
  "grpc.code": "Internal",
  "grpc.component": "server",
  "grpc.error": "rpc error: code = Internal desc = upload debuginfo: copy to /var/lib/parca/debuginfo/.../debuginfo: get next upload chunk (343932928 bytes read so far): receive from stream: rpc error: code = Unavailable desc = i/o timeout",
  "grpc.method": "Upload",
  "grpc.method_type": "client_stream",
  "grpc.request.deadline": "2023-08-03T10:53:19Z",
  "grpc.service": "parca.debuginfo.v1alpha1.DebuginfoService",
  "grpc.start_time": "2023-08-03T10:38:19Z",
  "grpc.time_ms": "5000.786", // coresponds to `ReadTimeout:  5 * time.Second`
  "level": "error",
  "msg": "finished call",
  "name": "parca",
  "peer.address": "10.0.30.5:38962",
  "protocol": "grpc",
  "ts": "2023-08-03T10:38:24.685793547Z"
}

I was able to solve this by increasing HTTP read and write timeouts.

My issue has some similarity to #2208, but that one has different errors and different solution.
I haven't encountered errors described there, so I am not sure if it solves #2208.

[CLAassistant]

All committers have signed the CLA.

[brancz]

Thank you so much for the contribution! Lgtm

[brancz]

The docs are auto-generated, do you mind running make README.md? Then I'm happy to merge this.

[quite4work]

@brancz done

Also I have removed Defaults to ... at the end of the descriptions, because it just repeats the same information as at the begining. For example:

--http-read-timeout=5s Timeout duration for HTTP server to read request body. Defaults to 5s

[manojVivek]

@all-contributors Please add @quite4work for code.

[allcontributors]

@manojVivek

I've put up a pull request to add @quite4work! 🎉