Improve error message for missing required Pipeline options in Datalflow runner for Java SDK

Here is an example error message when we fail to set GCP project ID:

Caused by: java.lang.IllegalArgumentException: Missing required value for [public abstract java.lang.String org.apache.beam.runners.dataflow.options.DataflowPipelineOptions.getProject(), "Project id. Required when running a Dataflow in the cloud. See https://cloud.google.com/storage/docs/projects for further details."](public abstract java.lang.String org.apache.beam.runners.dataflow.options.DataflowPipelineOptions.getProject(), "Project id. Required when running a Dataflow in the cloud. See https://cloud.google.com/storage/docs/projects for further details.").

We should make the error message more actionable by suggesting a command line parameter that sets the pipeline option or pointing to relevant programmatic API that sets it.

Full error message:

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:293)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: Failed to construct instance from factory method DataflowRunner#fromOptions(interface org.apache.beam.sdk.options.PipelineOptions)
at org.apache.beam.sdk.util.InstanceBuilder.buildFromMethod(InstanceBuilder.java:233)
at org.apache.beam.sdk.util.InstanceBuilder.build(InstanceBuilder.java:162)
at org.apache.beam.sdk.runners.PipelineRunner.fromOptions(PipelineRunner.java:56)
at org.apache.beam.sdk.Pipeline.create(Pipeline.java:135)
at org.apache.beam.examples.WordCount.main(WordCount.java:175)
... 6 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.beam.sdk.util.InstanceBuilder.buildFromMethod(InstanceBuilder.java:222)
... 10 more
Caused by: java.lang.IllegalArgumentException: Missing required value for [public abstract java.lang.String org.apache.beam.runners.dataflow.options.DataflowPipelineOptions.getProject(), "Project id. Required when running a Dataflow in the cloud. See https://cloud.google.com/storage/docs/projects for further details."](public abstract java.lang.String org.apache.beam.runners.dataflow.options.DataflowPipelineOptions.getProject(), "Project id. Required when running a Dataflow in the cloud. See https://cloud.google.com/storage/docs/projects for further details.").
at org.apache.beam.sdk.repackaged.com.google.common.base.Preconditions.checkArgument(Preconditions.java:383)
at org.apache.beam.sdk.options.PipelineOptionsValidator.validate(PipelineOptionsValidator.java:70)
at org.apache.beam.runners.dataflow.DataflowRunner.fromOptions(DataflowRunner.java:196)
... 15 more

Imported from Jira [BEAM-1973](https://issues.apache.org/jira/browse/BEAM-1973). Original Jira may contain additional context.
Reported by: tvalentyn.

Start with PipelineOptionsValidator and DataflowRunner.fromOptions, which appear in the reported stack trace, and trace how the missing project option is validated. Done means the error identifies an actionable command-line parameter or programmatic API for setting the required option, with coverage for the resulting message.

Written by the indexing model from the issue text.