HDDS-13360. Ask if the PR contains AI generated code in the pull request template

[cchung100m]

What changes were proposed in this pull request?

Ask if the PR contains AI generated code in the pull request template

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-13360

How was this patch tested?

N/A

[dombizita]

Thank you @cchung100m, this is a really good idea! Copying from https://www.apache.org/legal/generative-tooling.html#include-in-contributions:

When providing contributions authored using generative AI tooling, a recommended practice is for contributors to indicate the tooling used to create the contribution. This should be included as a token in the source control commit message, for example including the phrase “Generated-by: ”. This allows for future release tooling to be considered that pulls this content into a machine parsable Tooling-Provenance file.

We should highlight to add the “Generated-by: ” to the commit message, which is currently missing most of the time. But as we do squash and merge, should we highlight this to committers to add it manually from the PR description? @adoroszlai what do you think?