Configure nodes.conf path dynamically from config

Removes the use of init() to initialize the variable.

- Closes: #1596
- See also: #1569

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

Makefile

@@ -45,10 +45,6 @@ wwctl: $(config) $(call godeps,cmd/wwctl/main.go)
 wwclient: $(config) $(call godeps,cmd/wwclient/main.go)
 	CGO_ENABLED=0 GOOS=linux go build -mod vendor -a -ldflags "-extldflags -static" -o wwclient cmd/wwclient/main.go
 
-update_configuration: $(config) $(call godeps,cmd/update_configuration/update_configuration.go)
-	go build -X 'github.com/warewulf/warewulf/internal/pkg/node.ConfigFile=./etc/nodes.conf'" \
-	    -mod vendor -tags "$(WW_GO_BUILD_TAGS)" -o update_configuration cmd/update_configuration/update_configuration.go
-
 wwapid: $(config) $(apiconfig) $(call godeps,internal/app/api/wwapid/wwapid.go)
 	go build -o ./wwapid internal/app/api/wwapid/wwapid.go