add go module to manage Go packages via go install (#12152)

* add golang_package module to manage Go packages via go install

Adds a new module to install, update, and remove Go packages
using go install. Supports inline version pinning in package
names (e.g. pkg/tool/cmd with version suffix).

Assisted-by: Claude Opus 4.6
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix copyright year and BOTMETA alphabetical order

* fix environment keyword docs, add integration test aliases

- Use C(environment) instead of O(ignore:environment) for task keyword
- Add tests/integration/targets/golang_package/aliases for CI
- Fix setup.yml: handle Alpine/ArchLinux/FreeBSD package names, skip Go < 1.16
- Pin tests to x/tools v0.24.1 (only version compatible with Go 1.16-1.25)

Co-authored-by: Cursor <cursoragent@cursor.com>

* test signing trace

Co-authored-by: Cursor <cursoragent@cursor.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

.github/BOTMETA.yml

@@ -676,6 +676,8 @@ files:
     maintainers: pixslx
   $modules/gitlab_project_approvals.py:
     maintainers: masa-orca
+  $modules/golang_package.py:
+    maintainers: shrbhosa
   $modules/grove.py:
     maintainers: zimbatm
   $modules/gunicorn.py: