[dagster-tableau] Pin tableauserverclient version (#25441)

## Summary & Motivation

`dagster-tableau` tests fail
[here](https://buildkite.com/dagster/dagster-dagster/builds/99632#0192b583-1d7e-42fe-8973-3f0db3a12b3c)
for Python 3.8.

For some reasons, pip installed `tableauserverclient==0.19` for these
tests, which has a different implementation of `TSC.Server()` that is
not compatible with our implementation.

After investigating and testing locally, our implementation requires at
least `tableauserverclient` version 0.32, which is the first version to
implement the Datasources endpoint. This PR pins
`tableauserverclient>=0.32` in setup.py, which is compatible with Python
3.7+.

## How I Tested These Changes

Tested locally with Python 3.8.19 and 3.11.9

python_modules/libraries/dagster-tableau/setup.py

@@ -38,7 +38,8 @@ def get_version() -> str:
     install_requires=[
         f"dagster{pin}",
         "pyjwt[crypto]",
-        "tableauserverclient",
+        # Datasources endpoint were added in 0.32
+        "tableauserverclient>=0.32",
     ],
     include_package_data=True,
     python_requires=">=3.8,<3.13",