feat: Add ability to update phrase matchers (#128)

* feat: Add ability to update phrase matchers feat: Add issue model stats to time series feat: Add display name to issue model stats

PiperOrigin-RevId: 407647313

Source-Link: googleapis/googleapis@33fd29d

Source-Link: https://github.com/googleapis/googleapis-gen/commit/6abc897d85d6d22d6c4bfa31d21d7acce4048c79
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