Disable buffered output in build scripts (#316)

This fixes the issue where logs printed using `print()` from the build
scripts show up at the very end after all the subprocess output. e.g.
https://github.com/microsoft/qsharp/actions/runs/4986064660/jobs/8926399062#step:8:1407

Author: minestarks

build.py

@@ -10,9 +10,13 @@
 import venv
 import shutil
 import subprocess
+import functools
 
 from prereqs import check_prereqs
 
+# Disable buffered output so that the log statements and subprocess output get interleaved in proper order
+print = functools.partial(print, flush=True)
+
 parser = argparse.ArgumentParser(
     description="Builds all projects in the repo, unless specific projects to build are passed "
     "as options, in which case only those projects are built."

prereqs.py

@@ -10,6 +10,7 @@
 import sys
 import subprocess
 import tempfile
+import functools
 
 python_ver = (3, 11)  # Python support for Windows on ARM64 requires v3.11 or later
 rust_ver = (1, 69)  # Ensure Rust version 1.69 or later is installed
@@ -21,6 +22,9 @@
 rust_fmt_ver = (1, 5, 2)  # Current version when Rust 1.69 shipped
 clippy_ver = (0, 1, 69)
 
+# Disable buffered output so that the log statements and subprocess output get interleaved in proper order
+print = functools.partial(print, flush=True)
+
 
 def check_prereqs(install=False):
     ### Check the Python version ###