Support using separate Pulsar cluster as package service

[jiangpengcheng]

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[Copilot]

Pull request overview

This pull request adds support for using a separate Pulsar cluster as a package service for downloading function/source/sink packages, decoupling package management from runtime messaging. However, it contains a critical issue with invalid Go version references.

Changes:

• Adds optional packageService field to Function, Source, and Sink CRDs for dedicated package download configuration
• Implements environment variable prefixing (PACKAGE_) and dedicated volume mount paths to avoid conflicts
• Adds Java runtime fields (entryClass, instancePath) for customizing Java instance configuration
• Updates Go version references from 1.24.11 to 1.24.13 (⚠️ CRITICAL: version does not exist)

Reviewed changes

Copilot reviewed 41 out of 41 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
api/compute/v1alpha1/*_types.go	Adds PackageService field to Function, Source, and Sink specs
api/compute/v1alpha1/zz_generated.deepcopy.go	Auto-generated deep copy methods for new fields
pkg/webhook/*.go	Adds validation for packageService field
controllers/spec/common.go	Core implementation: downloadServiceConfig, env prefixing, volume deduplication
controllers/spec/function.go, sink.go, source.go	Updates to use new downloadServiceConfig abstraction
controllers/spec/*_test.go	Unit tests for package service feature
config/crd/bases/*.yaml	CRD schema updates for packageService and Java runtime fields
manifests/crd.yaml	Consolidated CRD definitions
charts/*	Helm chart CRD templates
.ci/tests/integration-oauth2/*	New integration test for package service feature
docs/design/package-service-download-design.md	Design documentation
go.mod, api/go.mod, Dockerfile, etc.	Go version updates (⚠️ CRITICAL ISSUE)

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