Produce cleaner bytecode for 'with' and 'async with' by generating separate code for normal and exceptional paths. (#6641)

Remove BEGIN_FINALLY, END_FINALLY, CALL_FINALLY and POP_FINALLY bytecodes. Implement finally blocks by code duplication.
Reimplement frame.lineno setter using line numbers rather than bytecode offsets.

Include/opcode.h

@@ -30,10 +30,11 @@ extern "C" {
 #define BINARY_TRUE_DIVIDE       27
 #define INPLACE_FLOOR_DIVIDE     28
 #define INPLACE_TRUE_DIVIDE      29
+#define RERAISE                  48
+#define WITH_EXCEPT_START        49
 #define GET_AITER                50
 #define GET_ANEXT                51
 #define BEFORE_ASYNC_WITH        52
-#define BEGIN_FINALLY            53
 #define END_ASYNC_FOR            54
 #define INPLACE_ADD              55
 #define INPLACE_SUBTRACT         56
@@ -59,14 +60,11 @@ extern "C" {
 #define INPLACE_AND              77
 #define INPLACE_XOR              78
 #define INPLACE_OR               79
-#define WITH_CLEANUP_START       81
-#define WITH_CLEANUP_FINISH      82
 #define RETURN_VALUE             83
 #define IMPORT_STAR              84
 #define SETUP_ANNOTATIONS        85
 #define YIELD_VALUE              86
 #define POP_BLOCK                87
-#define END_FINALLY              88
 #define POP_EXCEPT               89
 #define HAVE_ARGUMENT            90
 #define STORE_NAME               90
@@ -127,8 +125,6 @@ extern "C" {
 #define BUILD_TUPLE_UNPACK_WITH_CALL 158
 #define LOAD_METHOD             160
 #define CALL_METHOD             161
-#define CALL_FINALLY            162
-#define POP_FINALLY             163
 
 /* EXCEPT_HANDLER is a special, implicit block type which is created when
    entering an except handler. It is not an opcode but we define it here