fix[ci]: fix commithash calculation for pypi release

[charles-cooper]

What I did

fix #4308

How I did it

How to verify it

Commit message

there is a mismatch between the commit hash in the binary of the github
release vs the pypi release. for example,
```bash
~ $ vyper --version  # pipx install vyper==0.4.0
0.4.0+commit.e9db8d9
```
```bash
~ $ .vvm/vyper-0.4.0 --version
0.4.0+commit.e9db8d9f
```

this is due to how git computes the shorthash. when checkout is run for
release-pypi.yml, it doesn't fetch the full commit history, and so there
are fewer commits, so `git rev-parse --short HEAD` returns a smaller
fingerprint for the commit hash.

this commit amends the pypi release checkout step so that it matches the
github release workflow.

it also adds a debug step to the relevant workflows so that we can debug
the commit hash during the github action.

Description for the changelog

Cute Animal Picture

[charles-cooper]

compare build.yml
https://github.com/charles-cooper/vyper/actions/runs/11346861432/job/31556966779#step:3:5

and release-pypi.yml
https://github.com/charles-cooper/vyper/actions/runs/11346861677/job/31556897715#step:4:5

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.12%. Comparing base (a70a024) to head (bd5b4f1).
Report is 6 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (a70a024) and HEAD (bd5b4f1). Click for more details.

HEAD has 138 uploads less than BASE

Flag	BASE (a70a024)	HEAD (bd5b4f1)
	139	1

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #4309       +/-   ##
===========================================
- Coverage   91.40%   46.12%   -45.29%     
===========================================
  Files         112      112               
  Lines       15917    15923        +6     
  Branches     2693     2693               
===========================================
- Hits        14549     7344     -7205     
- Misses        934     8025     +7091     
- Partials      434      554      +120     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[pcaversaccio]

I would recommend maybe making a special test release called 0.4.0.post1 (it's PEP 440 compatible) on TestPyPI and make a local test as well. I know, they might prune some accounts periodically (see here), but it's a special situation. That's also how I do test my snekmate CI release pipeline here.