[DOCS] Remove data-stream tests from 'exclude' list in build.gradle

[tlfeng]

Issue #, if available:
#142

Description of changes:

The PR requests merging the code into oss-docs branch.

In PR #226, "Data Stream" are removed from the documents, the code snippet tests of "Data Stream" can be removed from the exclude list in docs/build.gradle

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[odfe-release-bot]

Attention!
Request for admin to review the code before start one or more of these tests:

Type these trigger phrase to accept the tests:

• start gradle check
• start sample test1
• start sample test2

Type this trigger phrase to add PR Creator to accept list:

• add this user

[odfe-release-bot]

❌   DCO Check Failed
Run ./dev-tools/signoff-check.sh remotes/origin/oss-docs 774465050ba298e0c55a6d1aac2392f7f60a173f to check locally
Use git commit with -s to add 'Signed-of-by: {EMAIL}' on impacted commits