[AA-FIR] Add support for constant evaluation of string templates.

Support FirStringConcatenationCall in FirCompileTimeConstantEvaluator.
This allows string templates ("foo${bar}") to be evaluated as constants,
assuming the interpolated expressions are themselves constant.

In addition, fixes some handling bugs with KtConstantEvaluationMode,
where some expressions that are not valid in a `const val` declaration
were being supported for `CONSTANT_EXPRESSION_EVALUATION`, including
non-static final Java fields in FIR, and composite expressions of
non-const properties in FE1.0.

analysis/analysis-api/testData/components/compileTimeConstantProvider/evaluate/javaFinalField.txt

@@ -1,8 +1,8 @@
 expression: Build.VERSION_CODES().CUPCAKE
 
 CONSTANT_EXPRESSION_EVALUATION
-constant: 3
-constantValueKind: Int
+constant: NOT_EVALUATED
+constantValueKind: NOT_EVALUATED
 
 CONSTANT_LIKE_EXPRESSION_EVALUATION
 constantLike: 3