gh-109276: Complete test.pythoninfo

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• Enable collect_sysconfig() on Windows.
• Add sysconfig 'abs_builddir' and 'srcdir'
• Add sysconfig.is_python_build()
• Add tempfile.gettempdir()
• Remove compatiblity with Python 2.7 (print_function).

• Issue: Enhance Python regrtest test runner (test.libregrtest) #109276

[vstinner]

Windows x64:

sysconfig.is_python_build: True
sysconfig[prefix]: D:\a\cpython\cpython
sysconfig[srcdir]: D:\a\cpython\cpython
tempfile.gettempdir: C:\Users\RUNNER~1\AppData\Local\Temp

Ubuntu:

sysconfig.is_python_build: True
sysconfig[ABIFLAGS]: d
sysconfig[CCSHARED]: -fPIC
sysconfig[CC]: gcc -pthread
sysconfig[CFLAGS]: -fno-strict-overflow -Wsign-compare -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -g -Og -Wall
sysconfig[CONFIG_ARGS]: '--config-cache' '--with-pydebug' '--with-openssl=/home/runner/work/cpython/cpython/multissl/openssl/1.1.1v'
sysconfig[HOST_GNU_TYPE]: x86_64-pc-linux-gnu
sysconfig[MACHDEP]: linux
sysconfig[MULTIARCH]: x86_64-linux-gnu
sysconfig[OPT]: -g -Og -Wall
sysconfig[PY_CFLAGS]: -fno-strict-overflow -Wsign-compare -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -g -Og -Wall
sysconfig[PY_CFLAGS_NODIST]: -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -fvisibility=hidden -I../cpython-ro-srcdir/Include/internal
sysconfig[PY_STDMODULE_CFLAGS]: -fno-strict-overflow -Wsign-compare -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -g -Og -Wall -std=c11 -Wextra -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration -fvisibility=hidden -I../cpython-ro-srcdir/Include/internal -IObjects -IInclude -IPython -I. -I../cpython-ro-srcdir/Include
sysconfig[Py_DEBUG]: 1
sysconfig[Py_ENABLE_SHARED]: 0
sysconfig[Py_NOGIL]: 0
sysconfig[SHELL]: /bin/sh -e
sysconfig[SOABI]: cpython-313d-x86_64-linux-gnu
sysconfig[abs_builddir]: /home/runner/work/cpython/cpython-builddir
sysconfig[prefix]: /usr/local
sysconfig[srcdir]: /home/runner/work/cpython/cpython-ro-srcdir
tempfile.gettempdir: /tmp