Fix phi3 chat template confusion with zephyr (#7449)
* Fix phi3 template matching vs zephyr
* Add regression test for new phi3 chat template
* Implement review suggestions
* Fix phi3 jinja test templates & match by <|end|>
* Apply suggestion
Co-authored-by: Xuan Son Nguyen <thichthat@gmail.com>
* Add all phi3 template variants in tests
* Remove unneeded message trimming
Co-authored-by: Xuan Son Nguyen <thichthat@gmail.com>
* Fix tests to not expect trimmed messages
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Co-authored-by: Xuan Son Nguyen <thichthat@gmail.com>
