Add sorting capabilities to Inference Endpoints table

[saikatsarkar056]

Summary

Adds a Sort dropdown and sortable columns to the Inference Endpoints management page, allowing users to sort endpoints by different fields.

Changes

• New Sort dropdown - Added a "Sort" button in the toolbar that displays a dropdown menu with sort options:

  • Endpoint
  • Service
  • Type
  • Model

• Sortable column headers - All data columns (Endpoint, Model, Service, Type) now support sorting by clicking the column header to toggle ascending/descending order

• Extended sort fields - Updated SortFieldInferenceEndpoint enum to support sorting by inference_id, service, task_type, and model

• Updated sorting logic - Enhanced useTableData hook to handle sorting for all fields, including Model which extracts data from nested service_settings

Checklist

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• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
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• This was checked for breaking HTTP API changes, and any breaking changes have been approved by the breaking-change committee. The release_note:breaking label should be applied in these situations.
• Flaky Test Runner was used on any tests changed
• The PR description includes the appropriate Release Notes section, and the correct release_note:* label is applied per the guidelines
• Review the backport guidelines and apply applicable backport:* labels.

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Release Note

Adds sorting capabilities to the Inference Endpoints table, allowing users to sort by Endpoint, Service, Type, or Model using a dropdown or by clicking column headers.

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[saikatsarkar056]

Closing this PR in favor of #252189