[Bug]: writing to datastore with dynamic project id working with direct runner but failing with Dataflowrunner

### What happened?

**This my code for writing into datastore :**
```
def write_to_datastore(gcloud_options, consumer_options, pipeline_options):
input_patterns = []
input_patterns.append(consumer_options.input)
"""Creates a pipeline that writes entities to Cloud Datastore."""
with beam.Pipeline(options=pipeline_options) as p:
_ = (
p
| 'read' >> ReadCsvFiles(input_patterns)
| 'create entity' >> beam.ParDo(EntityWrapperPardo(consumer_options))
| 'write to datastore' >> WriteToDatastore(consumer_options.datastore_project.get()))
```

**using direct runner:**
python -m testconsumer.py \
--runner DirectRunner \
--project itd-aia-dp \
--input gs://itd-aia-dp/dataflow/pipelines/datastore/input/Cortex-Model-Coefficients-2.csv \
--kind product \
--namespace datapipeline \
--datastore_project itd-aia-dp \
--output gs://itd-aia-dp/dataflow/pipelines/datastore/output/

**using dataflow runner**

python3 testconsumer.py \
--project=itd-aia-dp \
--runner=DataflowRunner \
--staging_location=gs://itd-aia-dp/staging \
--temp_location=gs://itd-aia-dp/temp \
--template_location=gs://itd-aia-dp/templates \
--requirements_file=requirements.txt \
--region=REGION \
--experiments=shuffle_mode=service \
--setup_file ./setup.py \
--input gs://itd-aia-dp/dataflow/pipelines/datastore/input/Cortex-Model-Coefficients.csv \
--kind product \
--output gs://itd-aia-dp/dataflow/pipelines/datastore/output/

stack trace :
ERROR:apache_beam.runners.runner:Error while visiting write to datastore/Write Batch to Datastore
Traceback (most recent call last):
File "/Users/gkumargaur/workspace/python/office/datastoreconsumer/pysparks/gcs_to_datastore_consumer_main.py", line 53, in
consumertemplate.run()
File "/Users/gkumargaur/workspace/python/office/datastoreconsumer/pysparks/panw/paloalto/consumertemplate.py", line 176, in run
write_to_datastore(gcloud_options, consumer_options, pipeline_options)
File "/Users/gkumargaur/workspace/python/office/datastoreconsumer/pysparks/panw/paloalto/consumertemplate.py", line 131, in write_to_datastore
_ = (
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/pipeline.py", line 600, in __exit__
self.result = self.run()
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/pipeline.py", line 550, in run
return Pipeline.from_runner_api(
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/pipeline.py", line 577, in run
return self.runner.run_pipeline(self, self._options)
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/runners/dataflow/dataflow_runner.py", line 524, in run_pipeline
self.visit_transforms(pipeline, options)
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/runners/runner.py", line 211, in visit_transforms
pipeline.visit(RunVisitor(self))
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/pipeline.py", line 626, in visit
self._root_transform().visit(visitor, self, visited)
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/pipeline.py", line 1260, in visit
part.visit(visitor, pipeline, visited)
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/pipeline.py", line 1260, in visit
part.visit(visitor, pipeline, visited)
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/pipeline.py", line 1263, in visit
visitor.visit_transform(self)
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/runners/runner.py", line 206, in visit_transform
self.runner.run_transform(transform_node, options)
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/runners/runner.py", line 233, in run_transform
return m(transform_node, options)
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/runners/dataflow/dataflow_runner.py", line 877, in run_ParDo
step = self._add_step(
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/runners/dataflow/dataflow_runner.py", line 652, in _add_step
[
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/runners/dataflow/dataflow_runner.py", line 653, in
item.get_dict()
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/transforms/display.py", line 370, in get_dict
self.is_valid()
File "/Users/gkumargaur/opt/miniconda3/envs/beam/lib/python3.9/site-packages/apache_beam/transforms/display.py", line 336, in is_valid
raise ValueError(
ValueError: Invalid DisplayDataItem. Value RuntimeValueProvider(option: datastore_project, type: str, default_value: None) is of an unsupported type.

### Issue Priority

Priority: 2 (default / most bugs should be filed as P2)

### Issue Components

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