bug#38335: Emacs term: bracketed paste not supported

[Gang Liang]

Bracketed paste is well supported in emacs, yet not in the term
buffer. The reason I assume is that the terminal buffers need to be
processed differently that special escape sequences need to be sent to
the underlying process, so the program running inside a term buffer
can tell the difference between manual typing and pasting.

Steps to reproduce the issue:

1. M-x term
2. run python (or any program which differentiates typing from pasting)
3. paste some codes with indentation into the python
4. verify the indentation is messed up