Trigger pipeline build based on the content of the commit

Description

Currently, the only condition to run a pipeline step is changesets. The customer wants to have the possibility to configure the pipeline build to be triggered only when a specific section of file was changed.

Example :

We have this piece of config in config.yml

someKey: 
   value: string 
anotherKey:
   anothervalue: number
hdp: 
   version: 1.0.0 
 

Wanted to execute the build step only if the version number was modified in the commit.

Related to : https://community.atlassian.com/t5/Bitbucket-Pipelines-questions/Execute-pipeline-only-if-specific-piece-of-config-is-changed-in/qaq-p/1838800