chore(deps): bump golang from 1.20-alpine to 1.23-alpine in /operator

Bumps golang from 1.20-alpine to 1.23-alpine.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

operator/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.20-alpine as build
+FROM golang:1.23-alpine as build
 RUN CGO_ENABLED=0 go install -v github.com/go-delve/delve/cmd/dlv@latest
 WORKDIR /workspace
 COPY ./go.mod ./go.sum ./