[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-standalone/tests-gen/org/jetbrains/kotlin/analysis/api/standalone/fir/test/cases/generated/cases/components/compileTimeConstantProvider/FirStandaloneNormalAnalysisSourceModuleCompileTimeConstantEvaluatorTestGenerated.java

@@ -232,6 +232,18 @@ public class FirStandaloneNormalAnalysisSourceModuleCompileTimeConstantEvaluator
         runTest("analysis/analysis-api/testData/components/compileTimeConstantProvider/evaluate/string_plusTwice.kt");
     }
 
+    @Test
+    @TestMetadata("string_templateConst.kt")
+    public void testString_templateConst() throws Exception {
+        runTest("analysis/analysis-api/testData/components/compileTimeConstantProvider/evaluate/string_templateConst.kt");
+    }
+
+    @Test
+    @TestMetadata("string_templateNonConst.kt")
+    public void testString_templateNonConst() throws Exception {
+        runTest("analysis/analysis-api/testData/components/compileTimeConstantProvider/evaluate/string_templateNonConst.kt");
+    }
+
     @Test
     @TestMetadata("string_toString.kt")
     public void testString_toString() throws Exception {