2.2.0 compiler migration

[Mr3zee]

Subsystem
Compiler Plugin

Problem Description
2.2.0 Kotlin brings a lot of changes in compiler API.

Solution
Using 2.2.0-Beta1 version perform the migration

[Copilot]

Pull Request Overview

This PR migrates the compiler plugin to support Kotlin 2.2.0-Beta1 by updating API usages and introducing new version‐specific helper methods via the vsApi mechanism. The key changes include adapting symbol and declaration retrieval methods, refactoring checker implementations to use object declarations and VS suffixes, and updating the IR code generation in the backend.

Reviewed Changes

Copilot reviewed 40 out of 40 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
compiler-plugin/compiler-plugin-k2/src/main/latest/kotlinx/rpc/codegen/FirVersionSpecificApiImpl.kt	Adds new VS-specific API functions for declaration and function retrieval.
compiler-plugin/compiler-plugin-k2/src/main/core/kotlinx/rpc/codegen/serialization/annotation.kt	Updates annotation constructor resolution to conform to new vsApi calls.
compiler-plugin/compiler-plugin-k2/src/main/core/kotlinx/rpc/codegen/checkers/*.kt	Refactors checkers to use object declarations and VS-specific methods.
compiler-plugin/compiler-plugin-backend/**	Updates several VersionSpecificApiImpl and IR generation files to use new vsApi patterns.
compiler-plugin/compiler-plugin-k2/build.gradle.kts	Replaces context receiver enabling with context parameter checks for Kotlin 2.2.0+

Comments suppressed due to low confidence (1)

compiler-plugin/compiler-plugin-backend/src/main/core/kotlinx/rpc/codegen/extension/RpcStubGenerator.kt:1484

• [nitpick] Since several similar vsApi blocks are used to assign dispatchReceiverParameterVS, consider abstracting this assignment into a helper function to reduce repetition and improve clarity.

vsApi { dispatchReceiverParameterVS = it }

[e5l]

lgtm, please check minor comments