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This is now possible because all non-EOL MacOS versions now support
`find -print0`/`sort -z`/`xargs -0`

Add CPython 3.14.0b1 and 3.15-dev

Mainly for tests, to avoid having to adjust call counts for stubs when the logic changes

Co-authored-by: Ivan Pozdeev <vano@mail.mipt.ru>

Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>

The release blog entry is here:
  https://pypy.org/posts/2025/02/pypy-v7319-release.html

Co-authored-by: binbjz <binbjz@gmail.com>

Do not execute conda-specific code if conda is not installed

1) Got rid of useless call to `cat`, much better to simply use sed with
   file as argument.

2) Got rid of `sort -u`. There is no need to sort the list.
   Additionally, the list `pyenv.d/rehash/conda.d/default.list` only has
   unique entries, and even if you have duplicate entries, the function
   will still work. --> No need for sort nor unique.

3) Further improvement is simple, save a cached
cleaned-list-v1.0 in `conda.d` and simple read from that file instead of
doing `sed`, which must be a more expensive operation than simply
reading from file.

Applies to the conda blacklist in `pyenv.d/rehash/conda.d/default.list`
No practical difference, but it looks misplaced when it sits at the end
of the file.

I was doing some debugging with PYENV_DEBUG=1 and noticed that a lot of
work was being done in conda.bash, even though I had not installed any
conda versions like `mambaforge`.

The solution is pretty simple, put all the code inside an if-block.
This aligns with what @varikin found in his pull request #3037

Additionally, I have refactored the code slightly for readability
(created function `build_conda_exclusion_list`), and added comments
which should make it easier to understand what's going on.

This commit simplifies debugging and should reduce the execution time of

```bash
eval "$(pyenv init -)"
```

slightly.

Source tarballs were changed to fix a human error: https://discuss.python.org/t/python-3-14-0-alpha-5/80364/3

Co-authored-by: binbjz <zhaobin@avenir.hk>
Co-authored-by: binbjz <binbjz@gmail.com>

ubuntu-20.04 is being retired by Github
tar_gz is mainly to verify URLs, OS version doesn't matter

* Add miniconda3-25.1.1-0

Co-authored-by: binbjz <zhaobin@avenir.hk>
Co-authored-by: binbjz <binbjz@gmail.com>

Co-authored-by: Dan Dees <dand@appsmiths.com>

Now that ubuntu-24 is out of beta at Github

Since for ubuntu_build, we only use one OS version
and the changes between versions are not as drastic as with MacOS,
it seems safe to have it upgrade automatically.