ModuleNotFoundError: No module named 'imp' while installing subunit 1.4.0 using Conan with Python 3.12

[vital]

# Environment

Python 3.12 is required to reproduce the issue

# Steps to reproduce

```
python3 -m pip install conan==1.62
conan profile new --detect default
mkdir /tmp/subunit
cd /tmp/subunit
cat >conanfile.txt <<EOF
[requires]
subunit/1.4.0

[generators]
cmake
EOF
conan install --build -- .
```

## Expected result

Package is installed

## Actual result

`py-compile` tool fails with `ModuleNotFoundError: No module named 'imp'`

Tail of the log:
```
...
libtool: install: chmod 644 ~/.conan/data/subunit/1.4.0/_/_/package/095274926d7784555b5378b8638d408c0c4d0378//lib/libcppunit_subunit.a
Traceback (most recent call last):
  File "<string>", line 2, in <module>
ModuleNotFoundError: No module named 'imp'
libtool: install: ranlib ~/.conan/data/subunit/1.4.0/_/_/package/095274926d7784555b5378b8638d408c0c4d0378//lib/libcppunit_subunit.a
make[1]: *** [Makefile:957: install-pkgpythonPYTHON] Error 1
make[1]: *** Waiting for unfinished jobs....
libtool: warning: remember to run 'libtool --finish //lib'
make[1]: Leaving directory '~/.conan/data/subunit/1.4.0/_/_/build/095274926d7784555b5378b8638d408c0c4d0378/src'
make: *** [Makefile:1447: install-am] Error 2
ERROR: subunit/1.4.0: Error in package() method, line 147
 autotools.install()
 ConanException: Error 2 while executing make install 'INSTALLARCHLIB=~/.conan/data/subunit/1.4.0/_/_/package/095274926d7784555b5378b8638d408c0c4d0378/lib' 'INSTALLSITEARCH=~/.conan/data/subunit/1.4.0/_/_/build/095274926d7784555b5378b8638d408c0c4d0378/build-release/archlib' 'INSTALLVENDORARCH=~/.conan/data/subunit/1.4.0/_/_/build/095274926d7784555b5378b8638d408c0c4d0378/build-release/archlib' 'INSTALLSITEBIN=~/.conan/data/subunit/1.4.0/_/_/package/095274926d7784555b5378b8638d408c0c4d0378/bin' 'INSTALLSITESCRIPT=~/.conan/data/subunit/1.4.0/_/_/package/095274926d7784555b5378b8638d408c0c4d0378/bin' 'INSTALLSITEMAN1DIR=~/.conan/data/subunit/1.4.0/_/_/build/095274926d7784555b5378b8638d408c0c4d0378/build-release/share/man/man1' 'INSTALLSITEMAN3DIR=~/.conan/data/subunit/1.4.0/_/_/build/095274926d7784555b5378b8638d408c0c4d0378/build-release/share/man/man3' DESTDIR=~/.conan/data/subunit/1.4.0/_/_/package/095274926d7784555b5378b8638d408c0c4d0378 -j16
```

# Analysis

`py-compile` script from Automake contains the following lines which are incompatible with Python 3.12, because `imp` module is deprecated:
```
$PYTHON -c "
import sys, os, py_compile, imp
```