feat(cve-fix): revert Dockerfile builder digests to Go 1.26.1

[agrawaliti]

This pull request updates all Dockerfiles in the repository to use newer, more specific, and pinned versions of the Microsoft Go base images. The changes ensure that builds are based on Go 1.26.1 images (with appropriate OS variants), improving reproducibility and consistency across Linux and Windows builds.

Base image updates:

• Updated all Linux-based Dockerfiles to use mcr.microsoft.com/oss/go/microsoft/golang:1.26.1 or 1.26.1-azurelinux3.0 with the corresponding SHA256 digest for improved version pinning and reproducibility. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]
• Updated all Windows-based Dockerfiles to use mcr.microsoft.com/oss/go/microsoft/golang:1.26.1-windowsservercore-ltsc2022 with the corresponding SHA256 digest for consistent Windows builds. [1] [2]

These updates help ensure that all builds use the same Go toolchain version and OS base, reducing the risk of inconsistencies and unexpected build issues.…ab10de78

Commit c08d827 inadvertently reverted Go builder image digests from 1.26.1 back to the floating azurelinux3.0 tag (Go 1.24.x). This restores the Go 1.26.1 pinned digests to fix remaining stdlib CVEs (CVE-2026-25679, CVE-2026-27139, CVE-2026-27142) that cannot be fixed on Go 1.24.x.

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[nddq]

we can might as well bump to go v1.26.2

skopeo inspect docker://mcr.microsoft.com/oss/go/microsoft/golang:1.26.2 --format "{{.Name}}@{{.Digest}}"
mcr.microsoft.com/oss/go/microsoft/golang@sha256:8d219d3f8e6edc46cc6d1f4bec61347560c2bca6ba53c4eae908c542fbc72a65