Refactor language features, which control effect system

- Introduce new language feature 'ReadDeserializedContracts', which
allows to deserialize contracts from metadata.

- Introduce new language feature 'AllowContractsForCustomFunctions',
which allows reading contracts from sources.

- Use new features instead of combination 'CallsInPlaceEffect ||
ReturnsEffect'

- Rename 'CallsInPlaceEffect' -> 'UseCallsInPlaceEffect',
'ReturnsEffect' -> 'UseReturnsEffect'. As names suggest, they control
if it is allowed to use corresponding effect in analysis.

We have to introduce separate 'ReadDeserializedContracts' to enable
contracts only in some modules of the project, because libraries are
read with project-wide settings (see KT-20692).

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt

@@ -131,6 +131,12 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
     )
     var effectSystem: Boolean by FreezableVar(false)
 
+    @Argument(
+        value = "-Xread-deserialized-contracts",
+        description = "Enable reading of contracts from metadata"
+    )
+    var readDeserializedContracts: Boolean by FreezableVar(false)
+
     open fun configureAnalysisFlags(collector: MessageCollector): MutableMap<AnalysisFlag<*>, Any> {
         return HashMap<AnalysisFlag<*>, Any>().apply {
             put(AnalysisFlag.skipMetadataVersionCheck, skipMetadataVersionCheck)