More detailed and specific machine info detection in TKG

TKG checks machine info through MachineInfo.java. At the current stage, not all machine info commands are tailored based on platforms. We would like to improve this by identifying which commands work on which platform and conditionally use different commands on different platforms. An example is https://github.com/adoptium/TKG/blob/5d83f85f235f5c9e1a7426a712173351f3dea281/src/org/openj9/envInfo/MachineInfo.java#L175

Start by reading src/org/openj9/envInfo/MachineInfo.java around line 175 and trace how machine information commands are selected. Identify the platform-specific command cases that need coverage and verify the detection path on each relevant platform. Done means TKG conditionally uses commands appropriate to the detected platform.

Written by the indexing model from the issue text.