* Add a currently-failing test for Java records and `@Ignore` it.
Also do the Maven gymastics required to ensure that this test only runs on Java
versions ≥17. (It would also work on Java 16, but 17 is all we have in the CI.)
Fix some compilation problems I saw when running locally, which for some reason
don't show up in the CI.
* Suppress some new lint options that trigger `-Werror`.
We may fix these later. (Every test will need an explicit constructor!)
* Select Java version with maven.compiler.release and maven.compiler.testRelease.
Use `assumeNotNull` rather than an if-statement.
* Specify <release>11</release> for javadoc.
* Restore the @see for AccessibleObject.
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