Use ApplyLogSetting function to simplify log setting

[gab-arrobo]

No description provided.

[Copilot]

Pull request overview

This PR refactors AMF log-level initialization to delegate per-component log configuration to util/logger.ApplyLogSetting, reducing repeated parsing/validation logic and aligning AMF log setup with the shared util logger behavior.

Changes:

• Simplified AMF.setLogLevel() by replacing duplicated per-logger level parsing with utilLogger.ApplyLogSetting(...).
• Removed the now-unneeded zapcore import from service/init.go.
• Bumped github.com/omec-project/util dependency from v1.7.3 to v1.7.4 to pick up ApplyLogSetting.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
service/init.go	Replaces inline log-level parsing with utilLogger.ApplyLogSetting calls for AMF/NAS/NGAP/OpenApi/Util loggers.
go.mod	Updates github.com/omec-project/util to v1.7.4.
go.sum	Updates checksums for github.com/omec-project/util v1.7.4.

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