fix: 导入作业模版，如果文件中的主机失效(hostId:-1)，导入异常

[wangyu096]

Version / Branch / tag

3.7.x

出了什么问题？(What Happened?)
导入作业模版，如果文件中的主机失效(hostId:-1)，导入异常

2023-06-13 10:06:21.311] ERROR [job-manakFileStepDTOTaskFileStepDTOe,a0fce33cb6173f3b9cb28384ce2cabf9,b57ec1992f39a065] 129478 --- [http-nio-19803-exec-5] c.w.e.h.ServiceExceptionControllerAdvice : Handle Exception, uri: /service/app/2/template/0/saveTemplateWithVariableId

java.lang.NullPointerException: null
        at com.tencent.bk.job.manage.model.dto.task.TaskTargetDTO.lambda$fillHostDetail$0(TaskTargetDTO.java:113)
        at java.util.ArrayList.forEach(ArrayList.java:1259)
        at com.tencent.bk.job.manage.model.dto.task.TaskTargetDTO.fillHostDetail(TaskTargetDTO.java:111)
        at com.tencent.bk.job.manage.model.dto.task.TaskTargetDTO.fromVO(TaskTargetDTO.java:94)
        at com.tencent.bk.job.manage.model.dto.task.TaskFileInfoDTO.fromVO(TaskFileInfoDTO.java:100)
        at com.tencent.bk.job.manage.model.dto.task.TaskFileStepDTO.lambda$fromVO$0(TaskFileStepDTO.java:109)
        at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
        at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384)
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
        at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:566)
        at com.tencent.bk.job.manage.model.dto.task.TaskFileStepDTO.fromVO(TaskFileStepDTO.java:109)
        at com.tencent.bk.job.manage.model.dto.task.TaskStepDTO.fromVO(TaskStepDTO.java:135)
        at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
        at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384)
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
        at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:566)
        at com.tencent.bk.job.manage.model.dto.task.TaskTemplateInfoDTO.fromReq(TaskTemplateInfoDTO.java:172)
        at com.tencent.bk.job.manage.api.inner.impl.ServiceTaskTemplateResourceImpl.saveTemplateForMigration(ServiceTaskTemplateResourceImpl.java:171)
        at com.tencent.bk.job.manage.api.inner.impl.ServiceTaskTemplateResourceImpl$$FastClassBySpringCGLIB$$eae0c809.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodTaskFileStepDTOTaskFileStepDTOTaskFileStepDTOTaskFileStepDTOProxy.java:218)

如何复现？(How to reproduce?)
作业模版中包含 hostId: -1 的主机

预期结果(What you expect?)

1. 导入按照失败的处理