New Feature: Step Failure Strategies

[#1]

Hi all - We're excited to announce a new capability in Bitbucket Pipelines we're calling Step Failure Strategies.

Detailed information is available on our announcement blog: 

https://www.atlassian.com/blog/bitbucket/introducing-step-failure-strategies-in-bitbucket-pipelines

[Ivan Peevski]

Additional suggestions for strategies

- rerun on a different runner (4x, legacy, on-prem)

- rerun on a different docker image (fallback to an older runner)

- notify - same as ignore, but also send email/slack message to someone to highlight the issue

- custom action(s) - list of steps to be executed on failure (a bit like how `after-script` runs). The above (notify) can be done using this instead of it being its own strategy. This can also allow for reports to be added to the PR