[Interpreter] Adds support for const/let variables to interpreter.

test/mjsunit/mjsunit.status

Index: test/mjsunit/mjsunit.status
diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status
index 88cbf56ddfbccb9ed42060944721ac4bdd453ed1..b8c404975746143082990d1d4eb14228d634bc9a 100644
--- a/test/mjsunit/mjsunit.status
+++ b/test/mjsunit/mjsunit.status
@@ -747,7 +747,6 @@
 }],  # 'arch == ppc and simulator_run == True'
 
 ['ignition == True', {
-  'const*': [SKIP],
   'debug-*': [SKIP],
   'es6/*': [SKIP],
   'es7/*': [SKIP],
@@ -782,9 +781,6 @@
   'compiler/optimized-for-in': [SKIP],
   'compiler/opt-next-call-turbo': [SKIP],
   'compiler/regress-446647': [SKIP],
-  'compiler/regress-447567': [SKIP],
-  'compiler/regress-96989': [SKIP],
-  'compiler/regress-const': [SKIP],
   'compiler/regress-funarguments': [SKIP],
   'compiler/regress-stacktrace-methods': [SKIP],
   'compiler/rotate': [SKIP],
@@ -792,19 +788,18 @@
   'compiler/uint32': [SKIP],
   'compiler/variables': [SKIP],
   'contextual-calls': [SKIP],
+  'const-declaration': [SKIP],
+  'const-redecl': [SKIP],
   'cyclic-array-to-string': [SKIP],
   'd8-worker-sharedarraybuffer': [SKIP],
-  'declare-locally': [SKIP],
   'delete-in-with': [SKIP],
   'deserialize-optimize-inner': [SKIP],
   'double-equals': [SKIP],
-  'eval-enclosing-function-name': [SKIP],
   'eval': [SKIP],
   'eval-stack-trace': [SKIP],
   'eval-typeof-non-existing': [SKIP],
   'field-type-tracking': [SKIP],
   'getter-in-prototype': [SKIP],
-  'global-const-var-conflicts': [SKIP],
   'global-hash': [SKIP],
   'global-load-from-eval-in-with': [SKIP],
   'global-load-from-nested-eval': [SKIP],
@@ -825,10 +820,8 @@
   'regress/regress-1125': [SKIP],
   'regress/regress-1170187': [SKIP],
   'regress/regress-1170': [SKIP],
-  'regress/regress-1178598': [SKIP],
   'regress/regress-119609': [SKIP],
   'regress/regress-1199637': [SKIP],
-  'regress/regress-1200351': [SKIP],
   'regress/regress-123919': [SKIP],
   'regress/regress-124594': [SKIP],
   'regress/regress-124': [SKIP],
@@ -842,7 +835,6 @@
   'regress/regress-1639': [SKIP],
   'regress/regress-1790': [SKIP],
   'regress/regress-1853': [SKIP],
-  'regress/regress-186': [SKIP],
   'regress/regress-1980': [SKIP],
   'regress/regress-2071': [SKIP],
   'regress/regress-220': [SKIP],
@@ -857,7 +849,6 @@
   'regress/regress-318420': [SKIP],
   'regress/regress-353551': [SKIP],
   'regress/regress-354357': [SKIP],
-  'regress/regress-3926': [SKIP],
   'regress/regress-3960': [SKIP],
   'regress/regress-3969': [SKIP],
   'regress/regress-3985': [SKIP],
@@ -874,7 +865,6 @@
   'regress/regress-4309-3': [SKIP],
   'regress/regress-4320': [SKIP],
   'regress/regress-4374': [SKIP],
-  'regress/regress-4388': [SKIP],
   'regress/regress-446389': [SKIP],
   'regress/regress-447756': [SKIP],
   'regress/regress-4509-Class-constructor-typeerror-realm' : [SKIP],
@@ -893,7 +883,6 @@
   'regress/regress-572589': [SKIP],
   'regress/regress-70066': [SKIP],
   'regress/regress-799761': [SKIP],
-  'regress/regress-88591': [SKIP],
   'regress/regress-94873': [SKIP],
   'regress/regress-95485': [SKIP],
   'regress/regress-97116b': [SKIP],