[S3] Read the request body to detect when the client closes the connection

[kmlebedev]

Describe the bug
Doesn't return an http status code 500 if client closes the connection.
It is not an Internal Server Error.
Creates noise in monitoring.

System Setup
2.13

Expected behavior
return 499 http code
See
https://stackoverflow.com/questions/57246852/go-http-context-not-able-to-capture-cancellation-signal-when-request-has-body-c
https://httpstatuses.com/499

Additional context
s3cmd put when ctrl + c

upload: './video-10005608.mp4' -> 's3://tech-intro/video-10005608.mp4'  [part 2 of 3, 15MB] [1 of 1]
    65536 of 15728640     0% in    0s   140.45 KB/s^CERROR:
Upload of './video-10005608.mp4' part 2 failed. Use
  /usr/local/bin/s3cmd abortmp s3://tech-intro/video-10005608.mp4 1408b78f-6394-467b-a924-dfa84806c75b
to abort the upload, or
  /usr/local/bin/s3cmd --upload-id 1408b78f-6394-467b-a924-dfa84806c75b put ...
to continue the upload.
See ya!

s3 log

common.go:53] response method:PUT URL:/buckets/tech-intro/.uploads/1408b78f-6394-467b-a924-dfa84806c75b/0002.part?collection=tech-intro with httpStatus:500 and JSON:{"error":"read input: unexpected EOF"}
s3api_object_handlers.go:311] post to filer: Put http://172.18.1.1:9090/buckets/tech-intro/.uploads/1408b78f-6394-467b-a924-dfa84806c75b/0002.part?collection=tech-intro: unexpected EOF