tools: use dmn@2.2.1

First commit:

tools: update dmn to 2.2.1 in update scripts

dmn 2.2.1 cleans more files than earlier versions.

Second commit:

tools: use dmn@2.2.1 to remove unneeded files

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines