Reloader support for CronJobs

[ksudarsh00]

Description:
Currently, reloader doesn't support CronJobs, so I have implemented support for Kubernetes CronJobs in the Stakater/Reloader repository and would like to contribute this feature back to the project.

Feature Implementation:
I have extended the functionality of Reloader to include support for Kubernetes CronJobs. With this enhancement, Reloader can now detect changes in ConfigMaps/Secrets and perform triggering a Job from an existing CronJob definition.

Steps to Reproduce:
To observe the added functionality, you can follow these steps:

Install Reloader in your Kubernetes cluster using the existing installation instructions.

Create a CronJob resource definition and add the annotations to watch for ConfigMaps/secrets.

Apply changes to the ConfigMap/Secrets resource such as modifying the data.

Verify that Reloader detects the changes and triggers a Job from the CronJob.

Code Contribution:
I have made the necessary modifications to the Reloader codebase to enable support for Kubernetes CronJobs. The changes include additions to the Reloader's resource detection logic and the implementation of triggering a Job from an existing CronJob.

I have thoroughly tested the feature, which works as expected in my company's pre-production environment.

I would happily contribute the code changes I've made to the Stakater/Reloader repository and collaborate with the maintainers to ensure proper integration.

If you think this feature is lacking and it's in your roadmap. Please let me know how I can proceed with this contribution.

[rasheedamir]

Yes definitely @ksudarsh00! PRs are more than welcome

[kaiwalyajoshi]

Looking forward to this feature as well!

[andreyolv]

Amazing, exactly what I need. Is there any prediction of when they will merge this feature?

[RockyMM]

Feature is available since #486