chore: Bump Go toolchain references to 1.25.11 across module, CI, and build images

[Copilot]

This updates the repository’s Go version to 1.25.11 in the same touchpoints used for prior Go patch upgrades, keeping module, CI, and container build inputs aligned. The goal is to ensure all build/test/publish paths resolve to the same Go patch version.

• Module toolchain

  • Updated go.mod directive from go 1.25.10 to go 1.25.11.

• CI workflow runtime

  • Updated GO_VERSION to 1.25.11 in:
    • .github/workflows/go.yml
    • .github/workflows/e2e-tests.yml
    • .github/workflows/unit-integration-tests.yml
    • .github/workflows/build-publish-mcr.yml
    • .github/workflows/publish-image.yml
    • .github/workflows/trivy.yml

• Container build base images

  • Updated Go builder image tag to 1.25.11 in:
    • docker/hub-net-controller-manager.Dockerfile
    • docker/member-net-controller-manager.Dockerfile
    • docker/mcs-controller-manager.Dockerfile
    • docker/net-crd-installer.Dockerfile

- go 1.25.10
+ go 1.25.11

- GO_VERSION: '1.25.10'
+ GO_VERSION: '1.25.11'

- FROM mcr.microsoft.com/oss/go/microsoft/golang:1.25.10 AS builder
+ FROM mcr.microsoft.com/oss/go/microsoft/golang:1.25.11 AS builder

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.08%. Comparing base (6bd8ae5) to head (a3ebedd).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #367      +/-   ##
==========================================
+ Coverage   67.06%   67.08%   +0.02%     
==========================================
  Files          33       33              
  Lines        3783     3783              
==========================================
+ Hits         2537     2538       +1     
  Misses       1071     1071              
+ Partials      175      174       -1     

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