[VOL-5246] - branch and release bbsim

VERSION
api/bbsim/bbsim.proto
api/bbsim/bbsim_dmi.proto
api/legacy/bbsim.proto
cmd/bbr/bbr.go
cmd/bbsim/bbsim.go
cmd/bbsimctl/bbsimctl.go
configs/bbsim.yaml
tests/bbr.groovy
tests/bbr.sh
tools/main.go
------------------------
  o Copyright message update
  o Append # [EOF]

cmd/bbr/bbr.go
cmd/bbsimctl/bbsimctl.go
tools/main.go
------------------------
  o Run gofmt -s -e -w on sources to fix linting complaints.

Change-Id: I666f97b35ccfc012c02a54c0f99677be290a40d0
diff --git a/tools/main.go b/tools/main.go
index 4f3d16d..be00e45 100644
--- a/tools/main.go
+++ b/tools/main.go
@@ -1,3 +1,6 @@
+//go:build tools
+// +build tools
+
 /*
  * Copyright 2018-2023 Open Networking Foundation (ONF) and the ONF Contributors
 
@@ -13,7 +16,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-// +build tools
 
 package tools
 
@@ -21,3 +23,5 @@
 	// protocol buffer compiler plugins
 	_ "github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger/options"
 )
+
+// [EOF]