fix: wire readiness manager into ApisixPluginConfig and ApisixUpstream controllers

[aslitaser]

Type of change:

• Bugfix

What this PR does / why we need it:

Fixes #2725

ApisixPluginConfig and ApisixUpstream controllers were missing the Readier field and never called Done() on the readiness manager. This caused the provider to always wait the full 5-minute hardcoded timeout before starting the sync loop on every restart.

Root cause: When registerAPIv2ForReadiness() registers these CRD types with the readiness manager, it adds all existing resources to a pending state. The ApisixRouteReconciler correctly calls defer r.Readier.Done() in its Reconcile() to mark resources as done, but ApisixPluginConfigReconciler and ApisixUpstreamReconciler were never wired up with the readiness manager — missing both the struct field and the Done() call.

Fix:

• Add Readier readiness.ReadinessManager field to both controller structs
• Add defer r.Readier.Done() at the start of both Reconcile() methods
• Pass Readier: readier when initializing both controllers in controllers.go

Pre-submission checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

[Copilot]

Pull request overview

This PR fixes startup readiness gating for API v2 ApisixPluginConfig and ApisixUpstream by wiring them into the shared readiness manager so the provider sync loop doesn’t wait the full hardcoded 5-minute timeout on restarts (Fixes #2725).

Changes:

• Inject Readier into ApisixPluginConfigReconciler and ApisixUpstreamReconciler during controller setup.
• Add Readier fields to both reconcilers.
• Call defer r.Readier.Done(...) at the start of both Reconcile() methods to mark pending resources as processed.

Reviewed changes

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

File	Description
internal/manager/controllers.go	Passes the readiness manager into the ApisixPluginConfig and ApisixUpstream controllers during setup.
internal/controller/apisixupstream_controller.go	Adds readiness manager dependency + marks ApisixUpstream reconciliations as done for readiness tracking.
internal/controller/apisixpluginconfig_controller.go	Adds readiness manager dependency + marks ApisixPluginConfig reconciliations as done for readiness tracking.

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[Baoyuantop]

Hi @aslitaser, please add a test case.