[FIR] Implement FIR metadata serialization

Add FirMetadataSerializer

Add CLI metadata tests on FIR

compiler/testData/cli/metadata/anonymousObjectTypeWithFir.args

@@ -0,0 +1,5 @@
+$TESTDATA_DIR$/anonymousObjectType.kt
+-d
+$TEMP_DIR$
+-language-version
+2.0

compiler/testData/cli/metadata/anonymousObjectTypeWithFir.out

@@ -1,3 +1,2 @@
 warning: language version 2.0 is experimental, there are no backwards compatibility guarantees for new language and library features
-error: compilation to metadata is not supported with language version 2.0 right now
-COMPILATION_ERROR
+OK

compiler/testData/cli/metadata/fir.kt

@@ -1,3 +0,0 @@
-package test
-
-expect class Some

compiler/testData/cli/metadata/inheritorOfExpectSealedClassWithFir.args

@@ -0,0 +1,8 @@
+$TESTDATA_DIR$/inheritorOfExpectSealedClass/common-1.kt
+$TESTDATA_DIR$/inheritorOfExpectSealedClass/common-2.kt
+$TESTDATA_DIR$/inheritorOfExpectSealedClass/common-3.kt
+-d
+$TEMP_DIR$
+-Xcommon-sources=$TESTDATA_DIR$/inheritorOfExpectSealedClass/common-1.kt,$TESTDATA_DIR$/inheritorOfExpectSealedClass/common-2.kt
+-language-version
+2.0

compiler/testData/cli/metadata/inheritorOfExpectSealedClassWithFir.out

@@ -0,0 +1,2 @@
+warning: language version 2.0 is experimental, there are no backwards compatibility guarantees for new language and library features
+OK

compiler/testData/cli/metadata/kotlinPackageWithFir.args

@@ -1,5 +1,5 @@
-$TESTDATA_DIR$/fir.kt
--language-version
-2.0
+$TESTDATA_DIR$/../kotlinPackage.kt
 -d
 $TEMP_DIR$
+-language-version
+2.0

compiler/testData/cli/metadata/kotlinPackageWithFir.out

@@ -0,0 +1,5 @@
+warning: language version 2.0 is experimental, there are no backwards compatibility guarantees for new language and library features
+compiler/testData/cli/kotlinPackage.kt:1:1: error: only the Kotlin standard library is allowed to use the 'kotlin' package
+package kotlin.mylibrary
+^
+COMPILATION_ERROR

compiler/testData/cli/metadata/moduleNameWithFir.args

@@ -0,0 +1,7 @@
+$TESTDATA_DIR$/moduleName.kt
+-d
+$TEMP_DIR$
+-module-name
+foo
+-language-version
+2.0

compiler/testData/cli/metadata/moduleNameWithFir.out

@@ -0,0 +1,2 @@
+warning: language version 2.0 is experimental, there are no backwards compatibility guarantees for new language and library features
+OK

compiler/testData/cli/metadata/optionalExpectationUsageWithFir.args

@@ -0,0 +1,7 @@
+$TESTDATA_DIR$/optionalExpectationUsage.kt
+-d
+$TEMP_DIR$
+-cp
+$TESTDATA_DIR$/../../../../dist/common/kotlin-stdlib-common.jar
+-language-version
+2.0

compiler/testData/cli/metadata/optionalExpectationUsageWithFir.out

@@ -0,0 +1,2 @@
+warning: language version 2.0 is experimental, there are no backwards compatibility guarantees for new language and library features
+OK