build(deps): Bump the docker-dependencies group across 1 directory with 1 update

Bumps the docker-dependencies group with 1 update in the /testutil/promrated directory: golang.


Updates `golang` from 1.26.6-alpine to 1.27.0-alpine

Updates `golang` from 1.26.6-alpine to 1.27.0-alpine

---
updated-dependencies:
- dependency-name: golang
  dependency-version: 1.27.0-alpine
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docker-dependencies
- dependency-name: golang
  dependency-version: 1.27.0-trixie
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docker-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

testutil/promrated/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.26.6-alpine AS builder
+FROM golang:1.27.0-alpine AS builder
 
 # Install dependencies
 RUN apk add --no-cache build-base git