Fix KT-82223: Unsupported API dependency types in test source sets

[TocnoWamGovoriyYaNeHacer201145]

Solution

• Replace api(kotlinTest("junit")) with implementation(kotlinTest("junit")) in test configurations
• Remove deprecated withJava() calls as per Kotlin MPP plugin recommendations

Changes

• libraries/stdlib/build.gradle.kts - Fix 3 instances in jvmTest blocks
• compiler/multiplatform-parsing/build.gradle.kts - Fix 1 instance in jvmTest

Verification

• No functional changes, only dependency configuration improvements
• Build warnings are resolved

Closes KT-82223

[hacer201145Official]

I think api() is better than implement().