refactor: GITHUB_ENV command / remove env.PATH (#1503)

* fix: GITHUB_ENV / PATH handling

* apply workaround

* add ctx to ApplyExtraPath

* fix: Do not leak step env in composite

See https://github.com/nektos/act/pull/1585 for a test

* add more tests

---------

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/runner/step_run.go

@@ -30,7 +30,7 @@ func (sr *stepRun) main() common.Executor {
 	return runStepExecutor(sr, stepStageMain, common.NewPipelineExecutor(
 		sr.setupShellCommandExecutor(),
 		func(ctx context.Context) error {
-			sr.getRunContext().ApplyExtraPath(&sr.env)
+			sr.getRunContext().ApplyExtraPath(ctx, &sr.env)
 			return sr.getRunContext().JobContainer.Exec(sr.cmd, sr.env, "", sr.Step.WorkingDirectory)(ctx)
 		},
 	))