feat: API for delegating credentials to generate a z/OS PassTicket

[Goutham024]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Linked to #4365
Part of the # (epic)

Type of change

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• fix: Bug fix (non-breaking change which fixes an issue)
• feat: New feature (non-breaking change which adds functionality)
• docs: Change in a documentation
• refactor: Refactor the code
• chore: Chore, repository cleanup, updates the dependencies.
• BREAKING CHANGE or !: Breaking change (fix or feature that would cause existing functionality to not work as expected)

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• PR title conforms to commit message guideline ## Commit Message Structure Guideline
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[Goutham024]

OLD PR: #4364
In the above PR I encountered multiple merge conflicts while rebasing for the DCO fix, as the branch was behind 155 commits with v3.x.x. After trying to sync with the latest changes, the conflicts became quite extensive and time-consuming to resolve. To simplify the process, I’ve created a this PR instead. Please review the PR.

[havenkat]

@balhar-jakub @pablocarle there was some issue with the previous pr for signing, hence created this new one. we will discuss in this pr.
CC: @Joe-Winchester

[havenkat]

@pablocarle @balhar-jakub PR is ready for review

[taban03]

It would be good to have an integration test for this new API

[taban03]

@Goutham024 @Joe-Winchester Regarding the integration test, some note that might help:
Please take a look at the integration-tests/src/test/java/org/zowe/apiml/integration/zos/PassTicketTest.java as reference.
It will be necessary to mock the SAF resouce class access. This should be possibile by adding the class in config/saf.yml which and zaas-service/saf.yml which is being used by the SafResourceAccessDummy