lang/go127 1.27.3

lang/go127: Update to 1.27.3

Changes:
  go1.27.3 (released 2026-10-19) includes security fixes to the
  crypto/x509 package.

MFH:		2026Q4

lang/go127: Update to 1.27.2

Changes:
   go1.27.2 (released 2026-10-08) includes security fixes to the go
   command, and the crypto/tls, html/template, net/http, net/textproto,
   and os packages, as well as bug fixes to the compiler, the linker,
   the runtime, the cover tool, the go fix command, vet, and the
   compress/flate, crypto/mlkem, encoding/json, encoding/json/v2,
   net/http, and os packages.

MFH:		2026Q4

lang/go12*: Update to 1.26.8 and 1.27.1

Changes:
  go1.26.8 (released 2026-09-01) includes fixes to cgo, the compiler,
  the runtime, and the debug/elf and os packages. See the Go 1.26.8
  milestone on our issue tracker for details.

  go1.27.1 (released 2026-09-01) includes fixes to cgo, the compiler,
  the runtime, the go fix command, and the database/sql, debug/elf,
  encoding/json, net/http, os, simd, and simd/archsimd packages. See the
  Go 1.27.1 milestone on our issue tracker for details.

lang/go127: Add go 1.27

Changes:
  Go 1.27 now supports generic methods: a method declaration may declare
  its own type parameters. This widely anticipated change allows adding
  generic functions within the namespace of a particular data type where
  before one had to declare such functions with a scope of the entire
  package.

  A key in a struct literal may now be any valid field selector for the
  struct type, not just a (top-level) field name of the struct.

  Function type inference has been generalized to apply in all contexts
  where a generic function is assigned to a variable of (or converted
  to) a matching function type.