upgrade Go from 1.23.4 to 1.25.0 (#2945)

* upgrade go to 1.25
* add minor version to be Go 1.25.0
* revert the Go version on README to keep the history of the release

go.mod

@@ -1,6 +1,6 @@
 module github.com/zalando/postgres-operator
 
-go 1.23.4
+go 1.25.0
 
 require (
 	github.com/aws/aws-sdk-go v1.53.8
@@ -11,7 +11,7 @@ require (
 	github.com/r3labs/diff v1.1.0
 	github.com/sirupsen/logrus v1.9.3
 	github.com/stretchr/testify v1.9.0
-	golang.org/x/crypto v0.31.0
+	golang.org/x/crypto v0.41.0
 	golang.org/x/exp v0.0.0-20240112132812-db7319d0e0e3
 	gopkg.in/yaml.v2 v2.4.0
 	k8s.io/api v0.30.4
@@ -21,6 +21,8 @@ require (
 	k8s.io/code-generator v0.25.9
 )
 
+require golang.org/x/tools/go/packages/packagestest v0.1.1-deprecated // indirect
+
 require (
 	github.com/Masterminds/semver v1.5.0
 	github.com/davecgh/go-spew v1.1.1 // indirect
@@ -51,15 +53,15 @@ require (
 	github.com/mxk/go-flowrate v0.0.0-20140419014527-cca7078d478f // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	golang.org/x/mod v0.17.0 // indirect
-	golang.org/x/net v0.25.0 // indirect
+	golang.org/x/mod v0.27.0 // indirect
+	golang.org/x/net v0.43.0 // indirect
 	golang.org/x/oauth2 v0.10.0 // indirect
-	golang.org/x/sync v0.10.0 // indirect
-	golang.org/x/sys v0.28.0 // indirect
-	golang.org/x/term v0.27.0 // indirect
-	golang.org/x/text v0.21.0 // indirect
+	golang.org/x/sync v0.16.0 // indirect
+	golang.org/x/sys v0.35.0 // indirect
+	golang.org/x/term v0.34.0 // indirect
+	golang.org/x/text v0.28.0 // indirect
 	golang.org/x/time v0.3.0 // indirect
-	golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d // indirect
+	golang.org/x/tools v0.36.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/protobuf v1.33.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect