Allow to use dynamic types for JS projects in IDEA.
Frontend: add default getter and setter to dynamic property descriptors.
Frontend: add JetTokens.EQEQEQ and JetTokens.EXCLEQEQEQ to OperatorConventions.NOT_OVERLOADABLE
Minor in JS AST: drop unused constructors from JsBinaryOperation, JsUnaryOperation, JsPrefixOperation and JsPostfixOperation.
JS backend: fix "is Boolean" check.
Minor in JS backend: save operation token as member of BinaryOperationTranslator.
Minor in JS backend: simplify CompareToBOIF::getIntrinsic.
JS backend: added the support dynamic.
JS frontend: introduce some JavaScript specific constants.
JS tests: added doTest and checkFooBoxIsOkByPath to BasicTest to simplify using generated tests.
JS tests: use js files from some places by default:

* add all js files from testData/_commonFiles
* add all js files from <testDir>/_commonFiles
* add <testDir>/cases/<testName>.js if it exists
JS tests: added tests for dynamic.
JS backend: use special JsScope(JsDynamicScope) for names from dynamic calls instead of use containing scope to avoid the impact on local names.
Moved containsReifiedTypeParameters to DescriptorUtils
JVM Backend: always inline callable containing reified TP
Refactored tests using Array constructor:

Some moved to tests with stdlib
Some changed to use arrayOfNulls
Introduced Array inline function in stdlib with same signature and semantics

Made Array constructor private and accepting no arguments
Removed codegen of Array-constructor with lambda
Added tests for stdlib Array constructors
Simple workaround for problem described in KT-6437

JS backend generate invalid code when inlining within constructor using property