Add ruff.toml with increased line-length (#2268)

The default is 88 which reformats too much.

This has no effect on templates but affects Python script in this PR
#2267

For context, we do not set any line length for golang and have 177 .go
files with max line length 150 or more.

ruff.toml

@@ -0,0 +1 @@
+line-length = 150