Extend `remsh` to read cookie from various sources

[jiahuili430]

Overview

We can set cookies using ./dev/run --erlang-cookie=crumbles or vm.args: -setcookie crumbles.

If neither of them is set or we set the cookie in both places, then the Erlang node will read the cookie from ~/.erlang.cookie.

Add this mechanism to the remsh script to extend flexibility.

Related PR: https://github.com/apache/couchdb/pull/5531

Testing recommendations

# After the change it should pass
./dev/run --admin=adm:pass -n 1 --erlang-cookie=crumbles --no-eval 'dev/remsh'

Related Issues or Pull Requests

Checklist

• [ ] Code is written and works correctly
• [ ] Changes are covered by tests
• [ ] Any new configurable parameters are documented in rel/overlay/etc/default.ini
• [ ] Documentation changes were made in the src/docs folder
• [ ] Documentation changes were backported (separated PR) to affected branches

[big-r81]

Thanks for looking into it, but wouldn't it be better to maintain only one remsh` script, which can be used for 'dev' and 'prod'?