[chore] Bump required Go version to 1.22.7

This is because
go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp 1.33.0
requires it.

Author: swiatekm

go.mod

@@ -1,6 +1,6 @@
 module github.com/open-telemetry/opentelemetry-operator
 
-go 1.22.0
+go 1.22.7
 
 retract v1.51.0