[KYUUBI #4379][BUILD] Exclude python virtual environments in the spotless maven plugin

### _Why are the changes needed?_

Exclude python virtual environments in the spotless maven plugin

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [x] [Run test](https://kyuubi.readthedocs.io/en/master/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #4384 from a49a/exclude-py-check.

Closes #4379

5f7db6a0 [Luning Wang] change path more general
a2c5abf2 [Luning Wang] [KYUUBI #4379][BUILD] Exclude python virtual environments in the spotless maven plugin

Authored-by: Luning Wang <wang4luning@gmail.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>

pom.xml

@@ -2083,6 +2083,9 @@
                                 <include>*/README.md</include>
                                 <include>docker/playground/README.md</include>
                             </includes>
+                            <excludes>
+                                <exclude>docs/*/lib/python*/**/*.md</exclude>
+                            </excludes>
                             <flexmark>
                                 <version>${flexmark.version}</version>
                             </flexmark>