Windows EnvironmentImpl::osArchitectureImpl() does not report proper architecture on ARM

[matejk]

Describe the bug

Poco osArchitectureImpl() reports "Unknown" on ARM Windows 11.

Expected behavior

OS Architecture shall be "ARM64"

Please add relevant environment information:

• Windows 11 ARM
• POCO Version: 1.14.1

[matejk]

Output from Foundation-testsuite on Windows 11 (ARM64 build):

testPlatform: POCO_OS:   4097
POCO_ARCH: 15

testFixedLength:
testBugcheck:
testEnvironment: OS Name:         Windows NT
OS Display Name: Windows 8
OS Version:      6.2 (Build 9200)
OS Architecture: Unknown
Node Name:       WIN-893K4LJ8OGQ
Node ID:         16:e0:0d:ac:09:6b
Number of CPUs:  6