ci: golangci-lint installer SHA mismatch breaks Lint (go) checks

[maniSbindra]

Problem

Since May 1, 2026, all PR and merge group 🧹 Lint (go) checks are failing with a SHA256 checksum mismatch when installing golangci-lint:

golangci/golangci-lint err hash_sha256_verify checksum for golangci-lint-2.12.1-linux-amd64.tar.gz did not verify

Root Cause

The install.sh script in golangci/golangci-lint was updated on May 1 (commit 35b2189782a6a059489289257e6523550167cb64 — "fix: install.sh script #6539") with new binary checksums for v2.12.1. However, golang.Taskfile.yml still pins GO_INSTALLER_SHA.golangciLint to the old commit 870ddc133592c3609f26af3b6f05ce2dd4a7afda (from 2025-10-13), which does not contain checksums for v2.12.1.

Since GO_VERSION.golangciLint is set to latest, the installer downloads v2.12.1 binaries but verifies them against the old install.sh checksums — causing the mismatch.

Impact

• All open PRs fail Lint (go) and Check Lint checks
• PR build(deps): bump github.com/hashicorp/terraform-exec from 0.25.1 to 0.25.2 in the all group #263 was merged on May 4 despite merge group lint failure (likely admin bypass)
• PR ci(deps): bump github/codeql-action from 4.35.2 to 4.35.3 in the all group across 1 directory #264 (dependabot) is currently blocked

Fix

Update GO_INSTALLER_SHA.golangciLint in .taskfiles/golang.Taskfile.yml from:

870ddc133592c3609f26af3b6f05ce2dd4a7afda  # 2025-10-13

to:

35b2189782a6a059489289257e6523550167cb64  # 2026-05-01