… log of failing builds

When using `make V=0`, we build packages silently, and on errors we
print out the tail of the log. For example, in
https://github.com/sagemath/sage/actions/runs/6842945144/job/18611620859
#step:11:7349
```
  [sphinxcontrib_serializinghtml-1.1.5] error installing, exit status 1.
End of log file:
  [sphinxcontrib_serializinghtml-1.1.5]     │ exit code: 1
  [sphinxcontrib_serializinghtml-1.1.5]     ╰─> See above for output.
  [sphinxcontrib_serializinghtml-1.1.5]
  [sphinxcontrib_serializinghtml-1.1.5]     note: This error originates
from a subprocess, and is likely not a problem with pip.
  [sphinxcontrib_serializinghtml-1.1.5]     full command:
/sage/local/var/lib/sage/venv-python3.9/bin/python3 -c '
  [sphinxcontrib_serializinghtml-1.1.5]     exec(compile('"'"''"'"''"'"'
```
But as this example shows, the current setting of showing 72 lines is no
longer suitable for Python packages. It only shows lengthy output from a
setuptools wrapper and boilerplate apologies from pip.

The real error message appears earlier, as can be seen in the full
printout of the log: https://github.com/sagemath/sage/actions/runs/68429
45144/job/18611620859#step:14:8095

Here we increase it from 72 lines to 120 lines, which should still be OK
for output on the terminal.

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URL: sagemath#36715
Reported by: Matthias Köppe
Reviewer(s): John H. Palmieri