Using an improvment of pion/datachannel, the channel opener can now
set an event to be called when the DATA_CHANNEL_ACK message is recieved

Resolves pion#1063
Relates to pion/datachannel#81

The offer side of the example now includes a -count and -wait options so
the test will eventually end and run faster. It also ends sending and
receiving EOF for clean "answer" exit.

a test passes on my machine and fails as part of the workflow.
this change triples the time the offer is side is waiting for a reply

as it's now part of the acceptance tests

restoring the xample to it's original code and adjusting
the test spec

with this change the data-channels pion docker works similar to the
other tests and mapping the source directly to /go/src

improve names in the ats workflow

by making sure the DOM is there before try to access it.
Hoping it will make a flaky test stable.

This reverts commit 045df4c.

This reverts commit a92c400.

Using an improvment of pion/datachannel, the channel opener can now
set an event to be called when the DATA_CHANNEL_ACK message is recieved

Resolves pion#1063
Relates to pion/datachannel#81

added a wait loop that checks the ensures the sendChanel is open
before hitting send

the code was to protected against a situation where ice gathering
finished before the DOM is loaded. it never happens.

the files will be available in the action's page, and could be
open using playwright trace app.

adding a script to help ensure only the answer will be
printed

problem is, it's all get squeezed in the answer field..

that way I have a chance of figuring out what the error is

when buildign the data channel example

otherwise we get a permission error

This one replaces an uderscore with a dash

based on an auto-review here are my fixes

somehow, I lost the ""

In the playwright container, so the tests will run only once