Update to Go 1.26.4, build runners and go.mod depedencies (#3108)

* update golang and dependencies
* fix incorrect log formatting
* clean mod chache and introduce GOARCH in Dockerfile (choose dynamically)
* remove GO111MODULE mentions
* bump github actions from v2 to v3
* bump docker runners to v7
* use extra event store for backwards compatibility with existing codebase
* updated generated opconfig api

docker/build_operator.sh

@@ -13,7 +13,7 @@ apt-get install -y wget
 
 (
     cd /tmp
-    wget -q "https://storage.googleapis.com/golang/go1.25.3.linux-${arch}.tar.gz" -O go.tar.gz
+    wget -q "https://storage.googleapis.com/golang/go1.26.4.linux-${arch}.tar.gz" -O go.tar.gz
     tar -xf go.tar.gz
     mv go /usr/local
     ln -s /usr/local/go/bin/go /usr/bin/go
@@ -26,5 +26,6 @@ export PATH="$PATH:$HOME/go/bin"
 export GOPATH="$HOME/go"
 mkdir -p build
 
-GO111MODULE=on go mod vendor
+go clean -cache -modcache
+go mod vendor
 CGO_ENABLED=0 go build -o build/postgres-operator -v -ldflags "$OPERATOR_LDFLAGS" cmd/main.go