Backport of drivers/docker: refactor use of clients in docker driver into release/1.5.x #17741
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Backport
This PR is auto-generated from #17731 to be assessed for backporting due to the inclusion of the label backport/1.5.x.
The below text is copied from the body of the original PR.
This PR refactors how we manage the two underlying clients used by the
docker driver for communicating with the docker daemon. We keep two clients
One with a hard-coded timeout that applies to all operations no matter
what, intended for use with short lived / async calls to docker.
The other has no timeout and is the responsibility of the caller to set a
context that will ensure the call eventually terminates (except in the
.Waitcase).The use of these two clients has been confusing and mistakes were made
in a number of places where calls were making use of the wrong client.
This PR makes it so that a user must explicitly call a function to get
the client that makes sense for that use case.
Fixes #17023