MB-68462:[BP] Fix eshell after migrating to erlang 26

We set cookie in code passed via -eval and I guess there is a race
between executing -eval and -remsh. If remsh is executed first,
then cookie will not be set by the time of connect.

This fix explicitly sets the order for those operarations:
we set the cookie first, and then start the remote shell.

Change-Id: Ie9cd9ee6b5561d2e07ee25b57f3db3787bcf42eb
Reviewed-on: https://review.couchbase.org/c/couchbase-cli/+/234795
Reviewed-by: Matt Hall <matt.hall@couchbase.com>
Well-Formed: Restriction Checker
Tested-by: Peter Searby <peter.searby@couchbase.com>

Author: timofey-barmin

cbmgr.py

@@ -2322,6 +2322,9 @@ def execute(self, opts):
                 # erl script fails in OSX as it is unable to find COUCHBASE_TOP
                 env["COUCHBASE_TOP"] = opts.base_path
 
+            eval_str = 'erlang:set_cookie(list_to_atom(os:getenv("CB_COOKIE"))), ' \
+                       f'shell:start_interactive({{remote, "{node}"}}).'
+
             args = [
                 path,
                 '-name',
@@ -2330,9 +2333,8 @@ def execute(self, opts):
                 'nocookie',
                 '-hidden',
                 '-eval',
-                'erlang:set_cookie(node(), list_to_atom(os:getenv("CB_COOKIE"))).',
-                '-remsh',
-                node,
+                eval_str,
+                '-noshell',
                 '-proto_dist',
                 'cb',
                 '-epmd_module',