jenkins: add example pipeline to run 2 stages in parallel

[tungbq]

Pipeline script location: https://github.com/tungbq/devops-basic/tree/main/topics/jenkins/helloworld DoD:

• Similar to the current example: https://github.com/tungbq/devops-basic/blob/main/topics/jenkins/helloworld/MyFirstPipeline.groovy
• Create the new file PipelineWithParralellStages.groovy (or you can propose a better name with similar meaning to that one)
• Add example pipeline to run 2 stages in parallel
• The example pipeline could be simple, no need too complicated (just print message is acceptable)
• New pipeline works fine on Jenkins

[vivekvr1]

I'm happy to report that I have completed the following tasks:

Created a new pipeline script file called PipelineWithParallelStages.groovy in the https://github.com/tungbq/devops-basic/tree/main/topics/jenkins/helloworld directory. 🚀 Added an example pipeline to the file that runs two stages in parallel, ParallelStage1 and ParallelStage2. 👯‍♀️ Each stage simply prints a message to the console. 🗣️ Tested the new pipeline script on Jenkins and confirmed that it works fine. ✅ Please let me know if you have any questions or feedback.

[tungbq]

I'm happy to report that I have completed the following tasks:

Created a new pipeline script file called PipelineWithParallelStages.groovy in the https://github.com/tungbq/devops-basic/tree/main/topics/jenkins/helloworld directory. 🚀 Added an example pipeline to the file that runs two stages in parallel, ParallelStage1 and ParallelStage2. 👯‍♀️ Each stage simply prints a message to the console. 🗣️ Tested the new pipeline script on Jenkins and confirmed that it works fine. ✅ Please let me know if you have any questions or feedback.

@dcompanykrish Wao!! I really happy and appreciated for your effort on this repository. I'll review all of your PR now. Thanks a lot 😍