feat(goreleaser): add loong64 build support for crane/gcrane/krane

[xuxiaowei-com-cn]

Add the loong64 (LoongArch 64-bit) architecture as a build target in .goreleaser.yml for all three binaries to ensure consistent binary counts across platforms.

Go has supported linux/loong64 since Go 1.21.

#2357

Summary

Add the loong64 architecture build target for all three binaries (crane, gcrane, krane) in .goreleaser.yml.

Changes

Add - loong64 architecture to each of the three builds entries:

Binary	goarch addition
crane	loong64
gcrane	loong64
krane	loong64

Why all three are required

goreleaser requires the archive to have the same number of binaries for each platform. If loong64 were added to only one or two of the binaries, the release would fail with:

archive has different count of binaries for each platform, which may cause your users confusion.

This follows the same pattern as the ppc64le addition (#1680 → #1688) — it was first added to one binary (#1680), then completed across all binaries (#1688) after goreleaser detected the mismatch.

Verification

• go tool dist list confirms Go supports linux/loong64
• The goarch list in the goreleaser config matches across all other supported architectures (amd64, arm, arm64, 386, s390x, riscv64, ppc64le, loong64)
• All three build entries have identical arch sets, ensuring consistent binary counts per (goos, goarch) combination

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.11%. Comparing base (84412cd) to head (2c8996e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2358   +/-   ##
=======================================
  Coverage   57.11%   57.11%           
=======================================
  Files         166      166           
  Lines       11468    11468           
=======================================
  Hits         6550     6550           
  Misses       4141     4141           
  Partials      777      777           

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