Without this, defaults of inverse options (--no-magic-len) were based
on the 'dest' value. In this case, dest='use_magic_len’, and the
default value is True. Which is confusing, because both
—use-magic-len and --no-magic-len show the same default value.
This adds a custom help formatter class which doesn’t add default
to the option help text if the help string already includes it.
1. Implement --aligned-obj-ix-tables which is used by default on the
ESP8266 in NodeMCU and Arduino.
2. Introduce --no-magic and --no-magic-len to allow disabling options
--use-magic-len and --use-magic. As these have been declared with
default=True and action='store_true', they couldn't be disabled
otherwise.
Closes https://github.com/espressif/esp-idf/issues/6717
