[K2] Methods implemented by delegation miss the KDoc

[atyrin]

The ticket is the same as #3384 but only about KDoc

interface CookieJar {
    /**
     * Saves cookies
     */
    fun saveFromResponse(url: String)
}

class CookieJarImpl() : CookieJar {
    override fun saveFromResponse(url: String) {}
}

class JavaNetCookieJar private constructor(
    delegate: CookieJarImpl,
) : CookieJar by delegate

With K1 the JavaNetCookieJar got kdoc from the interface

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In K2 it is missed on the class page:

• Dokka version: 2.0.0