Update Spark Plugin BUNDLE-LICENSE/NOTICE for 1.4.0

[snazy]

Fixes #3873

[jbonofre]

There are a few mistakes in the PR.

In the meantime, I'm doing a full pass on the spark plugin (uber jar).

[snazy]

@jbonofre I've pushed an update via the review commit.

The 3rd commit is a different approach by "just" copying the contents of the iceberg-spark-runtime.jar's LICENSE + NOTICE files. I'd expect those to be legally correct. As the iceberg-spark-runtime.jar is the only dependency that the plugin pulls in, it should be sufficient. WDYT?

[jbonofre]

Some comments:

1. I would rephrase the Iceberg "documentation" as This product bundles and includes code from Apache Iceberg. Same for Apache Spark.
2. JCTools (shaded in Netty) should be documented in the LICENSE file.
3. Apache DataSketches (shaded in Iceberg) should be documented in the LICENSE file.
4. OpenHFT Hashing (shaded in Parquet, shaded in Iceberg) should be documented in the LICENSE file.
5. RoaringBitmap (shaded in Iceberg) should be documented in the LICENSE file.
6. Eclipse Collection (shaded) should be documented in the LICENSE file.
7. LocationTech JTS (shaded) should be documented in the LICENSE file.
8. I don't see JavaFastPFOR wrapped anymore in the bundle jar. So it can be removed from the LICENSE file.
9. Apache Hive (api) can be removed from the LICENSE file as it's not shaded by ORC anymore.
10. Protobuf can be removed from the LICENSE file as it's not shaded by ORC anymore.

[jbonofre]

I would remove this section (just to avoid to "pollute" the LICENSE file).

[jbonofre]

NB: the copyright is not strictly required copyright here.

[snazy]

Hm - the issues are interesting, the 3rd commit in this PR represents an exact copy of the contents of Iceberg's LICENSE+NOTICE files from the bundle jar.