Issue #27213: Rework CALL_FUNCTION* opcodes to produce shorter and more
efficient bytecode:

* CALL_FUNCTION now only accepts position arguments
* CALL_FUNCTION_KW accepts position arguments and keyword arguments, but keys
  of keyword arguments are packed into a constant tuple.
* CALL_FUNCTION_EX is the most generic, it expects a tuple and a dict for
  positional and keyword arguments.

CALL_FUNCTION_VAR and CALL_FUNCTION_VAR_KW opcodes have been removed.

2 tests of test_traceback are currently broken: skip test, the issue #28050 was
created to track the issue.

Patch by Demur Rumed, design by Serhiy Storchaka, reviewed by Serhiy Storchaka
and Victor Stinner.

This is buggy in the old email code as well, but it doesn't affect anything
there because only the default line length is ever used there.

By Michael Lee.

This test file is a holdover from the days before hashlib, and doesn't seem to
have anything of value in it.

implementation is an implementation detail (and why that is so).

Patch by Ivan Levkivskyi.

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Development is moving to https://github.com/ilevkivskyi/com2ann