[java-datastore] Cloud Datastore Emulator doesn't support IN/NOT_IN/NOT_EQUAL operators

googleapis/java-datastore#665
com.google.cloud:libraries-bom:26.0.0

Gcloud SDK 394.0.0

#### Stack trace
```
com.google.cloud.datastore.DatastoreException: A list value is not allowed A list value is not allowed
com.google.datastore.v1.client.DatastoreException: A list value is not allowed, code=INVALID_ARGUMENT A list value is not allowed
com.google.datastore.v1.client.DatastoreException: A list value is not allowed, code=INVALID_ARGUMENT
at com.google.datastore.v1.client.RemoteRpc.makeException(RemoteRpc.java:171)
at com.google.datastore.v1.client.RemoteRpc.makeException(RemoteRpc.java:239)
at com.google.datastore.v1.client.RemoteRpc.call(RemoteRpc.java:100)
at com.google.datastore.v1.client.Datastore.runQuery(Datastore.java:117)
at com.google.cloud.datastore.spi.v1.HttpDatastoreRpc.runQuery(HttpDatastoreRpc.java:198)
at com.google.cloud.datastore.DatastoreImpl$1.call(DatastoreImpl.java:195)
at com.google.cloud.datastore.DatastoreImpl$1.call(DatastoreImpl.java:192)
at com.google.api.gax.retrying.DirectRetryingExecutor.submit(DirectRetryingExecutor.java:103)
at com.google.cloud.RetryHelper.run(RetryHelper.java:76)
at com.google.cloud.RetryHelper.runWithRetries(RetryHelper.java:50)
at com.google.cloud.datastore.DatastoreImpl.runQuery(DatastoreImpl.java:191)
at com.google.cloud.datastore.QueryResultsImpl.sendRequest(QueryResultsImpl.java:73)
at com.google.cloud.datastore.QueryResultsImpl.(QueryResultsImpl.java:57)
at com.google.cloud.datastore.DatastoreImpl.run(DatastoreImpl.java:184)
at com.google.cloud.datastore.DatastoreImpl.run(DatastoreImpl.java:175)
```

#### command used to run the emulator
gcloud beta emulators datastore start --project="projectName" --host-port=localhost:8082 --data-dir="dataDir" --use-firestore-in-datastore-mode

####installed gcloud components
Google Cloud SDK 394.0.0
app-engine-java 1.9.97
app-engine-python 1.9.100
beta 2022.07.19
bq 2.0.75
cloud-datastore-emulator 2.2.1
core 2022.07.19
gsutil 5.11

使用文档中的 gcloud beta emulators datastore start 命令以及使用 IN、NOT_IN 或 NOT_EQUAL 的查询重现该失败。从 Datastore.runQuery 到 HttpDatastoreRpc.runQuery 跟踪请求；issue 中没有指定任何仓库文件或测试。完成的标准是这些运算符在模拟器中可以正常工作，且不会出现报告的 list-value exception。

由索引模型根据 Issue 内容生成。