test: .style.yapf: Set column_limit=160 #15533

The current style is pep8, as suggested in https://github.com/bitcoin/bitcoin/blob/master/test/functional/README.md#style-guidelines.

generated with

$ yapf --version 
yapf 0.24.0
$ yapf --style-help --style=pep8 > .style.yapf

However, we don't use the column_limit of 79 right now. Practically it is somewhere between 120-240.

Some stats:

column_limit=120: 115 files changed, 2423 insertions(+), 1408 deletions(-)
column_limit=160: 108 files changed, 1563 insertions(+), 1247 deletions(-)
column_limit=200: 104 files changed, 1255 insertions(+), 1178 deletions(-)

Please bikeshed, as I don't care what the limit is, as long as it is >=120.

It is unlimited for our cpp: https://github.com/bitcoin/bitcoin/blob/14023c966c51a0a14a2e4477fbe3e5d810f91076/src/.clang-format#L21

utACK 1111f0718acea42954600a4dbd553ac40aae797f

Please bikeshed, as I don't care what the limit is, as long as it is >=120.

I actually like 79 columns best like pep8 recommends (https://www.python.org/dev/peps/pep-0008/#maximum-line-length), but that's about as much as I want to bikeshed. This change looks good to me.

utACK 1111f0718acea42954600a4dbd553ac40aae797f agree with @ryanofsky