[FLINK-30795][tests] StreamingWithStateTestBase of win not correct

[TJX2014]

What is the purpose of the change

Fix test case broken in win os.

Brief change log

Change "file://" to LocalFileSystem.getLocalFsURI.toString.

Verifying this change

org.apache.flink.table.planner.runtime.stream.sql.WindowAggregateITCase case work correctly in win os.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (yes / no)
• The public API, i.e., is any changed class annotated with @Public(Evolving): (yes / no)
• The serializers: (yes / no / don't know)
• The runtime per-record code paths (performance sensitive): (yes / no / don't know)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / no / don't know)
• The S3 file system connector: (yes / no / don't know)

Documentation

• Does this pull request introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)

[flinkbot]

CI report:

• c3f9f10 Azure: SUCCESS

Bot commands

The @flinkbot bot supports the following commands:

• @flinkbot run azure re-run the last Azure build

[healchow]

LGTM

[TJX2014]

Hi @healchow @zentol , could you please review and merge this pr? the ci has passed.

[zentol]

We no longer account for developing Flink on Windows. Only unix environments are supported.