Bump to 3.14.0a7

[zanieb]

No description provided.

[zanieb]

Windows failing with

cpython>        "C:\Users\RUNNER~1\AppData\Local\Temp\python-build-t157ajd1\Python-3.14.0a7\PCbuild\pcbuild.proj" (Build target) (1) ->
cpython>        "C:\Users\RUNNER~1\AppData\Local\Temp\python-build-t157ajd1\Python-3.14.0a7\PCbuild\pythoncore.vcxproj" (Build target) (3) ->
cpython>        "C:\Users\RUNNER~1\AppData\Local\Temp\python-build-t157ajd1\Python-3.14.0a7\PCbuild\zlib-ng.vcxproj" (default target) (4) ->
cpython>        (_EnsureZlibH target) ->
cpython>          C:\Users\RUNNER~1\AppData\Local\Temp\python-build-t157ajd1\Python-3.14.0a7\PCbuild\zlib-ng.vcxproj(220,7): error MSB4184: The expression "[System.IO.File]::ReadAllText(C:\Users\runneradmin\AppData\Local\Temp\python-build-t157ajd1\Python-3.14.0a7\externals\\zlib-ng-2.2.4\\zlib.h.in)" cannot be evaluated. Could not find a part of the path 'C:\Users\runneradmin\AppData\Local\Temp\python-build-t157ajd1\Python-3.14.0a7\externals\zlib-ng-2.2.4\zlib.h.in'.

Due to python/cpython#131438

Now

cpython>        (_EnsureZlibH target) ->
cpython>          C:\Users\RUNNER~1\AppData\Local\Temp\python-build-gqmme7fz\Python-3.14.0a7\PCbuild\zlib-ng.vcxproj(220,7): error MSB4184: The expression "[System.IO.File]::ReadAllText(C:\Users\runneradmin\AppData\Local\Temp\python-build-gqmme7fz\Python-3.14.0a7\externals\\zlib-ng-2.2.4\\zlib.h.in)" cannot be evaluated. Could not find a part of the path 'C:\Users\runneradmin\AppData\Local\Temp\python-build-gqmme7fz\Python-3.14.0a7\externals\zlib-ng-2.2.4\zlib.h.in'.

[zanieb]

And python/cpython#130157 is causing various problems with hmac and hacl