fix #19343 (#19344) [backport]

Ensure HttpClient onProgress is called once per second
Ensure that reported speed is accurate

(cherry picked from commit 58656aa)

lib/pure/httpclient.nim

@@ -673,7 +673,7 @@ proc reportProgress(client: HttpClient | AsyncHttpClient,
                     progress: BiggestInt) {.multisync.} =
   client.contentProgress += progress
   client.oneSecondProgress += progress
-  if (getMonoTime() - client.lastProgressReport).inSeconds > 1:
+  if (getMonoTime() - client.lastProgressReport).inSeconds >= 1:
     if not client.onProgressChanged.isNil:
       await client.onProgressChanged(client.contentTotal,
                                      client.contentProgress,