fix(make): explicit integration test timeout + single race switch (#5151)

with a cold fixture cache the integration suite builds and saves 18 docker
images across 36 sequential tests, which walks past `go test`'s default 10m
timeout and takes the fixture cache rebuild down with it. that suite now runs
`go test` directly with `-timeout=30m` (gotest.Tasks() has no timeout option),
plus `-count=1` since the built fixtures are the side effect we're actually
after and a test cache hit would skip producing them.

also adds `RACE` as one switch for the race detector across every suite:

- `RACE=false make test` drops `-race` from unit + integration and skips the
  race smoke, worth doing on a cache rebuild where the wall clock is all
  docker builds anyway
- `RACE=true` forces it on locally
- unset behaves as before: on in CI, off locally and on windows

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

.make/main_test.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/anchore/go-make/config"
+	"github.com/anchore/go-make/tasks/gotest"
+)
+
+func TestRaceEnabled(t *testing.T) {
+	tests := []struct {
+		name string
+		env  string // "" means RACE is unset
+		ci   bool
+		want bool
+	}{
+		{name: "default in CI", ci: true, want: true},
+		{name: "default locally", ci: false, want: false},
+		{name: "explicitly off in CI", env: "false", ci: true, want: false},
+		{name: "explicitly on locally", env: "true", ci: false, want: true},
+		{name: "unparseable falls back to default", env: "yes-please", ci: true, want: true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.env != "" {
+				t.Setenv("RACE", tt.env)
+			}
+			orig := config.CI
+			config.CI = tt.ci
+			t.Cleanup(func() { config.CI = orig })
+
+			if got := raceEnabled(); got != tt.want {
+				t.Errorf("raceEnabled() = %v, want %v", got, tt.want)
+			}
+
+			// the gotest suites get the same answer through the functional option
+			var cfg gotest.Config
+			race()(&cfg)
+			if cfg.Race != tt.want {
+				t.Errorf("race() set Race = %v, want %v", cfg.Race, tt.want)
+			}
+		})
+	}
+}