SOLR-17556: Fix smokeTest to use films as example for slim distribution

[HoustonPutman]

fixes for - SOLR-17556

(cherry picked from commit 80dfe11)

The initial commit fixed the smoke test script to not use the techproducts example for the slim distribution. In main the test_utf8 script was already removed, so I removed that here as well. I also removed the data, which required changing a few tests to fit the 1 less document.

More important, I also added the ability to set the solr home directory for examples. this is important for testing, but is much better than modifying the server directory in solr.

Will forward port the differences from the original commit to main if it's approved.

[epugh]

Changes all make sense from the perspective of backporting and assuming that techproducts isn't part of the slim distro, but films is.

One thought? Should the "slim" distribution come with ANY examples? I could understand that the slim one has no examples... Maybe, if you wanted to smoke test the "slim" distribution, you would just index the data from the regular distribution, but not include it in the download?

[HoustonPutman]

Yeah , I guess we could do that with the examples-dir option. Originally i had removed the examples when adding the slim distribution, but left it in to not disrupt the testing methodology too much

[HoustonPutman]

For 9x we shouldnt remove it though. Just for 10

[anshumg]

This looks good to me. Thanks for taking care of this @HoustonPutman