Add THIRD-PARTY-LICENSES.txt file and include it and LICENSE in jar files

[jradcliff]

No description provided.

[jradcliff]

Change to the jar task results in the following:

$ for x in $(find -name 'google-ads*SNAPSHOT\.jar'); do
echo "=== $x" && jar -tvf $x | grep LICENSE
done
=== ./google-ads-stubs-v10/build/libs/google-ads-stubs-v10-20.0.1-SNAPSHOT.jar
 11352 Mon Dec 16 16:53:10 EST 2019 META-INF/LICENSE
 56324 Thu Jul 28 11:15:46 EDT 2022 META-INF/THIRD-PARTY-LICENSE.txt
=== ./google-ads-examples/build/libs/google-ads-examples-20.0.1-SNAPSHOT.jar
 11352 Mon Dec 16 16:53:10 EST 2019 META-INF/LICENSE
 56324 Thu Jul 28 11:15:46 EDT 2022 META-INF/THIRD-PARTY-LICENSE.txt
=== ./google-ads-stubs-v11/build/libs/google-ads-stubs-v11-20.0.1-SNAPSHOT.jar
 11352 Mon Dec 16 16:53:10 EST 2019 META-INF/LICENSE
 56324 Thu Jul 28 11:15:46 EDT 2022 META-INF/THIRD-PARTY-LICENSE.txt
=== ./google-ads-shadowjar/build/libs/google-ads-shadowjar-20.0.1-SNAPSHOT.jar
 11352 Mon Dec 16 16:53:10 EST 2019 META-INF/LICENSE
 56324 Thu Jul 28 11:15:46 EDT 2022 META-INF/THIRD-PARTY-LICENSE.txt
=== ./google-ads-stubs-lib/build/libs/google-ads-stubs-lib-20.0.1-SNAPSHOT.jar
 11352 Mon Dec 16 16:53:10 EST 2019 META-INF/LICENSE
 56324 Thu Jul 28 11:15:46 EDT 2022 META-INF/THIRD-PARTY-LICENSE.txt
=== ./google-ads-codegen/build/libs/google-ads-codegen-20.0.1-SNAPSHOT.jar
 11352 Mon Dec 16 16:53:10 EST 2019 META-INF/LICENSE
 56324 Thu Jul 28 11:15:46 EDT 2022 META-INF/THIRD-PARTY-LICENSE.txt
=== ./google-ads-migration-examples/build/libs/google-ads-migration-examples-20.0.1-SNAPSHOT.jar
 11352 Mon Dec 16 16:53:10 EST 2019 META-INF/LICENSE
 56324 Thu Jul 28 11:15:46 EDT 2022 META-INF/THIRD-PARTY-LICENSE.txt
=== ./google-ads/build/libs/google-ads-20.0.1-SNAPSHOT.jar
 11352 Mon Dec 16 16:53:10 EST 2019 META-INF/LICENSE
 56324 Thu Jul 28 11:15:46 EDT 2022 META-INF/THIRD-PARTY-LICENSE.txt