[CssSelector] Moved a test into the Tests folder.
merged branch jakzal/2.3-cssselector-test-location (PR #8090)

This PR was merged into the 2.3 branch.

Discussion
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[CssSelector] Moved a test into the Tests folder.

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
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b2e52e8 [CssSelector] Moved a test into the Tests folder.