Ability to condition the execution of Bitbucket Pipe sections in steps

Bitbucket Pipes (https://bitbucket.org/product/features/pipelines/integrations) are implemented in Pipelines, which means that they are not something that is recognized by bash as an executable.

This means that it's not possible to condition the execution of a Pipe command with an "if" during a build execution.

This feature request is to add the ability to condition the Pipe from running only if give conditions (like environment variables being a certain value for example) are true.