refactor: replace sort.Strings with slices.Sort (#23457)

The slices package provides type-safe generic replacements for the
old typed sort convenience functions. The codebase already uses
slices.Sort in 43 call sites; this finishes the migration for the
remaining 29.

- sort.Strings(x)          -> slices.Sort(x)
- sort.Float64s(x)         -> slices.Sort(x)
- sort.StringsAreSorted(x) -> slices.IsSorted(x)

examples/examples.go

@@ -9,7 +9,7 @@ import (
 	"io"
 	"io/fs"
 	"path"
-	"sort"
+	"slices"
 	"strings"
 	"sync"
 
@@ -105,8 +105,8 @@ func parseAndVerifyExamples() (examples []codersdk.TemplateExample, err error) {
 		}
 	}
 
-	sort.Strings(wantEmbedFiles)
-	sort.Strings(gotEmbedFiles)
+	slices.Sort(wantEmbedFiles)
+	slices.Sort(gotEmbedFiles)
 	want := strings.Join(wantEmbedFiles, ", ")
 	got := strings.Join(gotEmbedFiles, ", ")
 	if want != got {