Bump kotlin 2.2

[Flórián Garaba (fgaraba)]

Summary

• Bumps the Kotlin compiler from 2.0.21 to 2.4.10 across all five sub-builds. This unblocks the use of com.jetbrains.intellij.platform:plugin-system-parser-impl (compiled with Kotlin 2.4 metadata), which is being added to the structure-intellij version catalog as groundwork for a future parser migration, as well as some other issues (MP-7810 Correctly handle 403 error from Marketplace in verifier service)
• Replaces the bytecode-shape heuristic in KotlinMethods.isKotlinDefaultMethod() with a semantically correct check against @kotlin.Metadata (via kotlinx-metadata-jvm). The old approach pattern-matched a specific INVOKESTATIC → $DefaultImpls instruction sequence that the Kotlin 2.x compiler no longer emits when -Xjvm-default=all-compatibility is active — causing the check that all internal API violating usages are found test to report four false-positive NoInternalTypeUsage findings after the compiler bump. The new approach asks whether the method appears in the class's own declared functions list in Kotlin metadata; if it doesn't, the compiler synthesized it - regardless of which lowering strategy produced the bytecode.
• Pins apiVersion/languageVersion in the five verifier-test fixture modules (mock-plugin, before-idea, after-idea, additional-before-idea, additional-after-idea) independently from the project's own language level, so the fixture bytecode shape doesn't drift with future toolchain bumps.

Mechanical fixes required by the version bump

• ide-diff-builder: updated kotlinx-serialization-runtime:1.0-M1-1.4.0-rc (incompatible with the 2.4.x plugin) to kotlinx-serialization-json:1.11.0; removed dead import kotlinx.serialization.stringify.
• plugins-verifier-service ValueType<T>: added : Any upper bound — Kotlin 2.2 promotes to an error the case where a Kotlin class with a nullable T overrides a Java generic member that expects non-null T.
• KtClassResolver: replaced cache.get(key) { nullable } (rejected under Kotlin 2.2's stricter Caffeine overload resolution) with getIfPresent + conditional put.
• CachingPluginDependencyResolverProvider: replaced cache.put(this.pluginId, r) (String?) with cache.put(this.id, r) (String).
• Various toLowerCase()/toUpperCase() calls replaced with lowercase()/uppercase() (three files).

[Flórián Garaba (fgaraba)]

This file is the only "non-mechanic" change in this PR, this should warrant a more thorough review.

It's necessary in order to make the test case pass (we test classes that are compiled by the project's kotlin compiler, so bumping the compiler version changes the test subject itself).

This may be a bit close coupling though, if you say so I can split it into a separate PR.