Bring back debug.FreeOSMemory() call to prevent OOMKilled(s) (#1063)

* Revert "Revert "Bring back `debug.FreeOSMemory()` call""

This reverts commit 69538cb7e3.

* Revert "Revert "Revert "Remove `GOGC` environment variable from tapper"""

This reverts commit 3d9f37ab4b.

* Revert "Revert "Revert "Revert "Remove `GOGC` environment variable from tapper""""

This reverts commit 58ff0607ff.

Co-authored-by: gadotroee <55343099+gadotroee@users.noreply.github.com>

tap/tcp_streams_map.go

@@ -2,6 +2,7 @@ package tap
 
 import (
 	"runtime"
+	_debug "runtime/debug"
 	"sync"
 	"time"
 
@@ -47,6 +48,7 @@ func (streamMap *tcpStreamMap) CloseTimedoutTcpStreamChannels() {
 	for {
 		<-ticker.C
 
+		_debug.FreeOSMemory()
 		streamMap.streams.Range(func(key interface{}, value interface{}) bool {
 			// `*tlsStream` is not yet applicable to this routine.
 			// So, we cast into `(*tcpStream)` and ignore `*tlsStream`