Removed deprecated DaemonSet rolling update type and legacy template generation

[PulkitDadwal]

Ⅰ. Describe what this PR does

This PR removes deprecated DaemonSet APIs and modernizes template generation handling to improve future Kubernetes compatibility.

Changes made:

• Remove DeprecatedSurgingRollingUpdateType constant from daemonset_types.go
• Clean up compatibility logic for deprecated "Surging" rolling update type in defaults
• Update validation to only accept supported rolling update types (Standard and InPlaceIfPossible)
• Replace deprecated annotation-based template generation with standard Kubernetes Generation field
• Update corresponding tests to use modern generation tracking

Benefits:

• Eliminates technical debt from deprecated API usage
• Prepares codebase for future Kubernetes versions
• Simplifies validation and defaulting logic
• Uses standard Kubernetes patterns for generation tracking

Ⅱ. Does this pull request fix one issue?

fixes #2150

Ⅲ. Describe how to verify it

Build verification:

1. Ensure all files compile without errors: make build
2. Run unit tests: make test
3. Verify linting passes: make lint

Functional verification:

1. Create a DaemonSet with rollingUpdate.type: "Standard" - should work as before
2. Create a DaemonSet with rollingUpdate.type: "InPlaceIfPossible" - should work as before
3. Verify that deprecated "Surging" type is no longer accepted in validation
4. Check that GetTemplateGeneration() returns the correct generation value

Code verification:

1. Confirm DeprecatedSurgingRollingUpdateType is completely removed from codebase:

   grep -r "DeprecatedSurgingRollingUpdateType" . || echo "Not found - good!"

2. Verify deprecated annotation usage is removed:

   grep -r "DeprecatedTemplateGeneration" . || echo "Not found - good!"

Ⅳ. Special notes for reviews

• Backward compatibility: This change maintains backward compatibility as it only removes deprecated functionality that shouldn't be used in production
• No breaking changes: Existing DaemonSets using Standard or InPlaceIfPossible types will continue to work unchanged
• Test coverage: Updated existing tests to use modern patterns rather than deprecated APIs
• Migration: Users with deprecated configurations will need to update to use Standard type instead of Surging
• Future-proofing: This change prepares the codebase for Kubernetes versions that may remove these deprecated APIs entirely

Files to pay special attention to:

• apis/apps/v1alpha1/daemonset_types.go - Type definition removal
• pkg/controller/daemonset/daemonset_update.go - Logic change from annotation to Generation field
• pkg/webhook/daemonset/validating/daemonset_validation.go - Validation logic update

[kruise-bot]

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[kruise-bot]

@PulkitDadwal: PR needs rebase.

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