Simplify HDCZA

[vincentvanhees]

Fixes #1062

See issue for my reflections on why this change is needed.

Checklist before merging:

• [x] Existing tests still work (check by running the test suite, e.g. from RStudio).
• [ ] Added tests (if you added functionality) or fixed existing test (if you fixed a bug).
• [ ] Updated or expanded the documentation.
• [x] Updated release notes in inst/NEWS.Rd with a user-readable summary. Please, include references to relevant issues or PR discussions.
• [ ] Added your name to the contributors lists in the DESCRIPTION file, if you think you made a significant contribution.

[vincentvanhees]

After some reflection, I will make a few edits to this PR today:

• [x] Allow threshold to be modifiable for user.
• [x] List constrain2range as deprecated in GGIR.Rd