FIR checker: substitute type parameters in dispatch receiver type

Consider the following code:

```
fun test(a: List<String>) {
  a.first()
}
```

The dispatch receiver type of `first` in this case is `List<T>` before
this change. After this change, it's `List<String>`.

In addition, this change also replace the dispatch receiver type with
the more specific type if available. For example, consider the following

```
class MyList: ArrayList<String>()

fun test(a: MyList) {
  a.get(0)
}
```
The dispatch receiver type of `get` is `MyList`, instead of
`ArrayList<String>`. That is, a fake override is created in this case.

compiler/fir/analysis-tests/testData/resolve/smartcasts/receivers/implicitReceivers.fir.txt

@@ -100,7 +100,7 @@ FILE: implicitReceivers.kt
     public final fun R|kotlin/Any|.test_5(): R|kotlin/Int| {
         ^test_5 when () {
             (this@R|/test_5| is R|kotlin/collections/List<*>|) ->  {
-                this@R|/test_5|.R|kotlin/collections/List.size|
+                this@R|/test_5|.R|SubstitutionOverride<kotlin/collections/List.size: R|kotlin/Int|>|
             }
             (this@R|/test_5| is R|kotlin/String|) ->  {
                 this@R|/test_5|.R|kotlin/String.length|
@@ -113,7 +113,7 @@ FILE: implicitReceivers.kt
     }
     public final fun R|kotlin/Any|.test_6(): R|kotlin/Unit| {
         (this@R|/test_6| as R|kotlin/collections/List<*>|)
-        this@R|/test_6|.R|kotlin/collections/List.size|
+        this@R|/test_6|.R|SubstitutionOverride<kotlin/collections/List.size: R|kotlin/Int|>|
         (this@R|/test_6| as R|kotlin/String|)
         this@R|/test_6|.R|kotlin/String.length|
     }