feat: add componentConfig and annotations API types (EP#1898)

[swghosh]

Summary

• Extends ExternalSecretsConfig API with annotations and componentConfigs fields on ControllerConfig as specified in Enhancement Proposal #1898
• Adds new types: ComponentConfig, DeploymentConfig, Annotation
• Adds new ComponentName enum values: Webhook, CertController
• Includes CEL validation rules for reserved annotation prefixes (kubernetes.io/, app.kubernetes.io/, openshift.io/, k8s.io/) and reserved environment variable prefixes (HOSTNAME, KUBERNETES_, EXTERNAL_SECRETS_)
• Adds comprehensive integration test coverage for all new fields and validation rules
• Regenerated deepcopy functions and CRD manifests

Test plan

• Integration tests pass for all new onCreate and onUpdate test cases
• Verify CRD manifest includes new fields with proper validation schemas
• Verify reserved annotation/env var prefix rejection via CEL rules
• Verify componentName enum validation (ExternalSecretsCoreController, Webhook, CertController, BitwardenSDKServer)
• Verify revisionHistoryLimit minimum constraint (>=1)
• Verify maxItems=4 constraint on componentConfigs

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This pull-request has been approved by: swghosh

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