[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

analysis/analysis-api/testData/components/compileTimeConstantProvider/evaluate/propertyInit_DivByOtherProperty_val.descriptors.txt

@@ -1,9 +0,0 @@
-expression: 42 / d
-
-CONSTANT_EXPRESSION_EVALUATION
-constant: 42
-constantValueKind: Int
-
-CONSTANT_LIKE_EXPRESSION_EVALUATION
-constantLike: 42
-constantLikeValueKind: Int

analysis/analysis-api/testData/components/compileTimeConstantProvider/evaluate/string_templateConst.kt

@@ -0,0 +1,4 @@
+const val QUESTION = "the ultimate question of life, the universe, and everything"
+const val ANSWER = 42
+
+val MESSAGE = <expr>"The answer to ${QUESTION} is ${ANSWER}."</expr>

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

@@ -0,0 +1,9 @@
+expression: "The answer to ${QUESTION} is ${ANSWER}."
+
+CONSTANT_EXPRESSION_EVALUATION
+constant: "The answer to the ultimate question of life, the universe, and everything is 42."
+constantValueKind: String
+
+CONSTANT_LIKE_EXPRESSION_EVALUATION
+constantLike: "The answer to the ultimate question of life, the universe, and everything is 42."
+constantLikeValueKind: String

analysis/analysis-api/testData/components/compileTimeConstantProvider/evaluate/string_templateNonConst.kt

@@ -0,0 +1,5 @@
+val QUESTION = "the ultimate question of life, the universe, and everything"
+val ANSWER = 42
+val QUESTION_MEANING = null
+
+val MESSAGE = <expr>"The answer to ${QUESTION} is ${ANSWER}. The question is: ${QUESTION_MEANING}"</expr>

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

@@ -0,0 +1,9 @@
+expression: "The answer to ${QUESTION} is ${ANSWER}. The question is: ${QUESTION_MEANING}"
+
+CONSTANT_EXPRESSION_EVALUATION
+constant: NOT_EVALUATED
+constantValueKind: NOT_EVALUATED
+
+CONSTANT_LIKE_EXPRESSION_EVALUATION
+constantLike: "The answer to the ultimate question of life, the universe, and everything is 42. The question is: null"
+constantLikeValueKind: String