feat(build): set go version in Makefile

This commit explicitly sets the version of the go compiler, to
make development, testing and releasing consistent among multiple
machines.

Signed-off-by: San7o <santigio2003@gmail.com>

Author: San7o

Makefile

@@ -4,6 +4,10 @@ VERSION ?= 1.0.0
 ENV?=local
 include .env-${ENV}
 
+# Go version
+export GOTOOLCHAIN ?= go1.24.0
+export GOSUMDB ?= sum.golang.org
+
 # CHANNELS define the bundle channels used in the bundle.  Add a new
 # line here if you would like to change its default config. (E.g
 # CHANNELS = "candidate,fast,stable") To re-generate a bundle for

callback/go.mod

@@ -1,6 +1,6 @@
 module callback-service
 
-go 1.24.5
+go 1.24.0
 
 require sigs.k8s.io/controller-runtime v0.21.0