[K2] Sample analysis tests no longer pass with K2 analysis

[IgnatBeresnev]

Unit tests that check @sample resolution (introduced in #3195) used to pass, but after #3195 they started failing.

Looking at the failing tests, I think it's because the symbol implementation can no longer resolve local functions, such as

/**
 * @sample bar
 */
fun foo() {
    
}

fun bar() {}

It's probable that the project sources are no longer added to the scope of sample analysis in the symbols implementation.

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The tests can be found with FTS for TODO #3359.