[CI] Start the process of cleaning up the config step.

[mandel-macaque]

We want to be able to export and load the variables in the cacading pipelines. The way we have the scripts makes this process very complicated to do. We need to clean up the script. Then export the steps so that we can access them in the following pipelines.

This change is simply refactoring the way we load/export the default VSTS variables in a pipeline.

[dalexsoto]

Make sure to backport CI changes to our release branches like release/8.0.1xx-xcode15.4

[vs-mobiletools-engineering-service2]

🔥 [CI Build] Test results 🔥

Test results

❌ Tests failed on VSTS: test results

1 tests crashed, 1 tests failed, 165 tests passed.

Failures

❌ dotnettests tests (MacCatalyst)

🔥 Failed catastrophically on VSTS: test results - dotnettests_maccatalyst (no summary found).

Html Report (VSDrops) Download

❌ mmp tests

1 tests failed, 0 tests passed.

Html Report (VSDrops) Download

Successes

✅ cecil: All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (iOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (macOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (Multiple platforms): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (tvOS): All 1 tests passed. Html Report (VSDrops) Download
✅ framework: All 6 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 7 tests passed. Html Report (VSDrops) Download
✅ generator: All 2 tests passed. Html Report (VSDrops) Download
✅ install-source: All 1 tests passed. Html Report (VSDrops) Download
✅ interdependent-binding-projects: All 7 tests passed. Html Report (VSDrops) Download
✅ introspection: All 8 tests passed. Html Report (VSDrops) Download
✅ linker: All 65 tests passed. Html Report (VSDrops) Download
✅ mac-binding-project: All 1 tests passed. Html Report (VSDrops) Download
✅ mononative: All 6 tests passed. Html Report (VSDrops) Download
✅ monotouch (iOS): All 11 tests passed. Html Report (VSDrops) Download
✅ monotouch (MacCatalyst): All 7 tests passed. Html Report (VSDrops) Download
✅ monotouch (macOS): All 8 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 11 tests passed. Html Report (VSDrops) Download
✅ monotouch (watchOS): All 4 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ mtouch: All 1 tests passed. Html Report (VSDrops) Download
✅ xammac: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 8 tests passed. Html Report (VSDrops) Download
✅ xtro: All 2 tests passed. Html Report (VSDrops) Download

Pipeline on Agent
Hash: 04f8e878dafc7b7fe18eab8fde2a3c6075659549 [PR build]

[mandel-macaque]

/sudo backport release/8.0.1xx-xcode15.4

[vs-mobiletools-engineering-service2]

Backport Job to branch release/8.0.1xx-xcode15.4 Created! The magic is happening here

[vs-mobiletools-engineering-service2]

Hooray! Backport succeeded! Please see https://devdiv.visualstudio.com/DevDiv/_build/results?buildId=10132257 for more details.

[mandel-macaque]

/sudo backport release/8.0.1xx-xcode15.0

[vs-mobiletools-engineering-service2]

Backport Job to branch release/8.0.1xx-xcode15.0 Created! The magic is happening here

[vs-mobiletools-engineering-service2]

Oh no! Backport failed! Please see https://devdiv.visualstudio.com/DevDiv/_build/results?buildId=10132298 for more details.