newdevice: improve IOS-XE detection (#6429)

PPC_LINUX_IOSD or X86_64_LINUX_IOSD means IOS-XE, Drop the X86_64_ as that gives us full coverage.
Drop IOS-XE usage for detection.  Allows us to migrate ios detection to yaml.

includes/definitions/ios.yaml

@@ -8,6 +8,14 @@ over:
     - { graph: device_processor, text: 'CPU Usage' }
     - { graph: device_mempool, text: 'Memory Usage' }
 icon: cisco
+discovery:
+    -
+      sysDescr:
+          - 'Cisco Internetwork Operating System Software'
+          - 'IOS (tm)'
+          - 'Cisco IOS Software'
+          - 'Global Site Selector'
+      sysDescr_regex: '/^((?!LINUX_IOSD).)*$/' #IOS-XE adding more regex will break detection, modify instead
 bad_ifXEntry:
     - cisco1941
     - cisco886Va