Allow "latest" tag when using pipes

Hey team,

We have had a user request that "latest" tag be used when defining a pipe.
For example: atlassian/sftp-deploy:latest

The current implementation does not support this, and will give the following error when the latest tag is used:

It looks like you tried to use a pipe in your bitbucket-pipelines.yml that doesn’t exist. Check the name of the pipe and try again.

Their use case is that they have many pipelines steps configured, so when a version of a pipe updates - they need to manually update the version number every single time this occurs for each of their steps. This is very time-consuming for them.

I am aware that there is a workaround to reference the docker image location in the pipe tag, but this would reduce code complexity.

Cheers!

• Ben (Bitbucket Cloud Support)