Enable SAM conversion for Kotlin functions by default in new inference

KT-25686

compiler/testData/cli/jvm/explicitlyDisableSamConversionsWithOldFlag.args

@@ -0,0 +1,5 @@
+$TESTDATA_DIR$/newInferenceImpliesSamConversions.kt
+-d
+$TEMP_DIR$
+-Xnew-inference
+-XXLanguage\:-SamConversionForKotlinFunctions

compiler/testData/cli/jvm/explicitlyDisableSamConversionsWithOldFlag.out

@@ -0,0 +1,13 @@
+warning: ATTENTION!
+This build uses unsafe internal compiler arguments:
+
+-XXLanguage:-SamConversionForKotlinFunctions
+
+This mode is not recommended for production use,
+as no stability/compatibility guarantees are given on
+compiler or generated code. Use it at your own risk!
+
+compiler/testData/cli/jvm/newInferenceImpliesSamConversions.kt:4:9: error: type mismatch: inferred type is () -> TypeVariable(_L) but Runnable was expected
+    foo { }
+        ^
+COMPILATION_ERROR

compiler/testData/cli/jvm/explicitlyDisabledSamConversions.args

@@ -0,0 +1,5 @@
+$TESTDATA_DIR$/newInferenceImpliesSamConversions.kt
+-d
+$TEMP_DIR$
+-XXLanguage\:+NewInference
+-XXLanguage\:-SamConversionForKotlinFunctions

compiler/testData/cli/jvm/explicitlyDisabledSamConversions.out

@@ -0,0 +1,14 @@
+warning: ATTENTION!
+This build uses unsafe internal compiler arguments:
+
+-XXLanguage:+NewInference
+-XXLanguage:-SamConversionForKotlinFunctions
+
+This mode is not recommended for production use,
+as no stability/compatibility guarantees are given on
+compiler or generated code. Use it at your own risk!
+
+compiler/testData/cli/jvm/newInferenceImpliesSamConversions.kt:4:9: error: type mismatch: inferred type is () -> TypeVariable(_L) but Runnable was expected
+    foo { }
+        ^
+COMPILATION_ERROR

compiler/testData/cli/jvm/newInferenceImpliesSamConversions.args

@@ -0,0 +1,4 @@
+$TESTDATA_DIR$/newInferenceImpliesSamConversions.kt
+-d
+$TEMP_DIR$
+-XXLanguage\:+NewInference

compiler/testData/cli/jvm/newInferenceImpliesSamConversions.kt

@@ -0,0 +1,5 @@
+fun foo(r: Runnable) {}
+
+fun test() {
+    foo { }
+}

compiler/testData/cli/jvm/newInferenceImpliesSamConversions.out

@@ -0,0 +1,13 @@
+warning: ATTENTION!
+This build uses unsafe internal compiler arguments:
+
+-XXLanguage:+NewInference
+
+This mode is not recommended for production use,
+as no stability/compatibility guarantees are given on
+compiler or generated code. Use it at your own risk!
+
+compiler/testData/cli/jvm/newInferenceImpliesSamConversions.kt:1:9: warning: parameter 'r' is never used
+fun foo(r: Runnable) {}
+        ^
+OK

compiler/testData/cli/jvm/newInferenceWithOldFlagImpliesSamConversions.args

@@ -0,0 +1,4 @@
+$TESTDATA_DIR$/newInferenceImpliesSamConversions.kt
+-d
+$TEMP_DIR$
+-Xnew-inference

compiler/testData/cli/jvm/newInferenceWithOldFlagImpliesSamConversions.out

@@ -0,0 +1,4 @@
+compiler/testData/cli/jvm/newInferenceImpliesSamConversions.kt:1:9: warning: parameter 'r' is never used
+fun foo(r: Runnable) {}
+        ^
+OK