Exclude MapState example integration tests from Dataflow runner v2 suite

[kennknowles]

This test was added in #13802 but not excluded from this test suite.

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Post-Commit Tests Status (on master branch)

Lang	SDK	Dataflow	Flink	Samza	Spark	Twister2
Go		---		---		---
Java
Python				---		---
XLang				---		---

Pre-Commit Tests Status (on master branch)

---	Java	Python	Go	Website	Whitespace	Typescript
Non-portable
Portable	---		---	---	---	---

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GitHub Actions Tests Status (on master branch)

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[kennknowles]

run java postcommit

[kennknowles]

Run Java PreCommit

[reuvenlax]

lgtm

[reuvenlax]

run java postcommit

[kennknowles]

My exclusion solved the runner v2 failure, but actually it fails on runner v1 also.