[8.6] [Security Solution] Add host.name and host.hostname to exceptionable Endpoint fields (#148920) (#149364)

# Backport

This will backport the following commits from `main` to `8.6`:
- [[Security Solution] Add host.name and host.hostname to exceptionable
Endpoint fields
(#148920)](https://github.com/elastic/kibana/pull/148920)

<!--- Backport version: 8.9.7 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Kevin
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Solution] Add host.name and host.hostname to exceptionable Endpoint
fields (#148920)\n\n## Summary\r\n\r\nAddresses this ticket:
https://github.com/elastic/kibana/issues/148779\r\n\r\nAllows
`host.name` and `host.hostname` to be selected from the list
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Solution] Add host.name and host.hostname to exceptionable Endpoint
fields (#148920)\n\n## Summary\r\n\r\nAddresses this ticket:
https://github.com/elastic/kibana/issues/148779\r\n\r\nAllows
`host.name` and `host.hostname` to be selected from the list
of\r\navailable Endpoint fields.\r\n\r\n<img width=\"1725\"
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Solution] Add host.name and host.hostname to exceptionable Endpoint
fields (#148920)\n\n## Summary\r\n\r\nAddresses this ticket:
https://github.com/elastic/kibana/issues/148779\r\n\r\nAllows
`host.name` and `host.hostname` to be selected from the list
of\r\navailable Endpoint fields.\r\n\r\n<img width=\"1725\"
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BACKPORT-->

Co-authored-by: Kevin Logan <56395104+kevinlog@users.noreply.github.com>

x-pack/plugins/security_solution/public/detection_engine/rule_exceptions/utils/exceptionable_endpoint_fields.json

@@ -70,7 +70,9 @@
   "group.id",
   "host.architecture",
   "host.domain",
+  "host.hostname",
   "host.id",
+  "host.name",
   "host.os.Ext.variant",
   "host.os.family",
   "host.os.kernel",