feat: [CI-11708] - Extract multiple Issues

[HarnessAryan]

Fixes #19

[Ompragash]

@HarnessAryan Let's verify the below scenarios with the test image:

• Existing behavior for both deployment and build post calls without issueKeys input
• Existing behavior by passing array of issueKeys as input to the plugin
• Existing behavior to test single issuekey extraction
• New behavior (if tested already, just provide the pipeline link)

Share the test pipeline execution for each case with screenshots from Jira tickets in gist

[HarnessAryan]

@HarnessAryan Let's verify the below scenarios with the test image:

• Existing behavior for both deployment and build post calls without issueKeys input
• Existing behavior by passing array of issueKeys as input to the plugin
• Existing behavior to test single issuekey extraction
• New behavior (if tested already, just provide the pipeline link)

Share the test pipeline execution for each case with screenshots from Jira tickets in gist

TEST RESULTS: https://docs.google.com/document/d/1zheP-LPrYtDJE85i_l3u8bG5EkYsunuoxvF9gQWtzHs/edit?usp=sharing

[HarnessAryan]

Made all suggested changes and tested the changes for all scenarios.
UPDATED TEST RESULTS : https://docs.google.com/document/d/1zheP-LPrYtDJE85i_l3u8bG5EkYsunuoxvF9gQWtzHs/edit?usp=sharing