feat(utils): add VisitAllBreakable function

[AmadeusK525]

Useful for early breaks from the loop

[makasim]

Could you please provide some practical cases where this function could be helpful?

[AmadeusK525]

func hasOverTimeFunc(expr metricsql.Expr) bool {
	hasFunc := false
	metricsql.VisitAllBreakable(expr, func(node metricsql.Expr) {
		if fn, ok := node.(*metricsql.FuncExpr); ok {
			if strings.HasSuffix(fn.Name, "_over_time") {
				hasFunc = true
				return false
			}
		}
		return true
	})
	return hasFunc
}