Issue 2245, Zosprogram manager name sanitisation

[sd66dar]

Why

This PR addresses galasa-dev/projectmanagement#2245.
The issue required enforcing two rules for @ZosProgram annotations:
The name property should always be uppercased.
The name must not exceed 8 characters; otherwise, an exception should be thrown.

What Changed

Added logic in ZosProgramManagerImpl.generateZosProgram() to:
Convert the name attribute to uppercase using toUpperCase().
Validate the length of the name and throw a ZosProgramManagerException if it exceeds 8 characters.

Testing

Created a static inner class Dummy with real @ZosProgram annotations to mimic production code and validate:
Names are correctly uppercased.
Names with valid lengths (≤ 8 chars) are accepted.
Names exactly 8 characters long are accepted.

Added a test for invalid names (> 8 chars) using Mockito to mock the annotation and verify that an exception is thrown.
Used Mockito instead of PowerMockito for simplicity and faster execution.
Implemented an @ After teardown method to reset the singleton instance of ZosProgramPropertiesSingleton between tests, preventing state leakage that caused earlier failures.

[jadecarino]

Hi Sheriell, thank you for making your first PR!

Changes to do with checking the 8 character limit look good, however I'd like to request a change to do with the capitalisation of the name.

The name value is used later on in ZosProgramImpl and so if we simply capitalise that value and users have their program source named in non-capital letters like myprog.cbl, this change will mean the manager fails to find that file now. If the name is not capitalised, please can we throw an exception to state that names in the annotation and file names must be capitalised? A short description of this in the documentation for this manager (found here) would also be really useful. And, it would be great if you could also add a point to the v0.46.0 version's release notes in the section Changes affecting tests running locally or on the Galasa Service to describe the new validation checks that the z/OS Program Manager will make.

[sd66dar]

Update:

Changed code to instead throw an exception when a name is not uppercase, and updated the tests relating to name capitalisation accordingly
Added a description of the changes in v0.46.0 version's release notes