[FIR] Add regression tests for number of issues fixed in K2

List of issues:
KT-4113,  KT-6822,  KT-7389,  KT-17817, KT-20223
KT-21463, KT-24503, KT-24737, KT-24779, KT-24901
KT-27261, KT-28668, KT-30497, KT-30756, KT-36958
KT-37365, KT-37490, KT-38288, KT-41038, KT-41721
KT-42136, KT-42169, KT-42449, KT-42715, KT-43553
KT-43603, KT-43846, KT-43936, KT-46288, KT-46301
KT-47373, KT-47484, KT-47490, KT-47495, KT-47750
KT-47815, KT-47870, KT-48975, KT-49024, KT-49045
KT-50134, KT-50160, KT-50550, KT-51045, KT-51143
KT-51796, KT-52262, KT-52424, KT-52860, KT-52934
KT-53086, KT-53494, KT-53671, KT-53752, KT-53819
KT-54478, KT-54518, KT-54931, KT-54990, KT-55138
KT-55379, KT-55555, KT-56243

compiler/fir/analysis-tests/testData/resolve/inference/builderInference/ifInBuildMap.fir.txt

@@ -0,0 +1,15 @@
+FILE: ifInBuildMap.kt
+    public final fun main(): R|kotlin/Unit| {
+        R|kotlin/collections/buildMap|<R|kotlin/String|, R|kotlin/String|>(<L> = buildMap@fun R|kotlin/collections/MutableMap<kotlin/String, kotlin/String>|.<anonymous>(): R|kotlin/Unit| <inline=Inline, kind=EXACTLY_ONCE>  {
+            when () {
+                Boolean(true) ->  {
+                    R|kotlin/io/println|(String(test))
+                }
+                else ->  {
+                    this@R|special/anonymous|.R|SubstitutionOverride<kotlin/collections/MutableMap.put: R|Stub (chain inference): TypeVariable(V)?|>|(String(foo), String(bar))
+                }
+            }
+
+        }
+        )
+    }

compiler/fir/analysis-tests/testData/resolve/inference/builderInference/ifInBuildMap.kt

@@ -0,0 +1,12 @@
+// WITH_STDLIB
+// ISSUE: KT-51143
+
+fun main() {
+    buildMap {
+        if (true) {
+            println("test")
+        } else {
+            put("foo", "bar")
+        }
+    }
+}