[patch] Interactive release selection & missing license keys for 9.2.x channels

[PalVala]

Summary

This PR fixes two issues with the AI Service installation flow:

1. Restores the interactive release selection prompt that was previously bypassed with a hardcoded channel value.
2. Adds missing license key entries for the aibroker-9.2.x and aibroker-9.2.x-feature channels.

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Changes

python/src/mas/cli/aiservice/install/app.py

• Removed the hardcoded aiservice_channel = "9.1.x" workaround.
• Restored the interactive release selection prompt using WordCompleter, allowing users to choose their channel from the available catalog releases at install time.

python/src/mas/cli/cli.py

• Added missing license key mappings for:
  • aibroker-9.2.x → https://ibm.biz/MAS92-License
  • aibroker-9.2.x-feature → https://ibm.biz/MAS91-License

python/tests/integration/aiservice_install/test_app.py

• Updated test_install_interactive_advanced and test_install_interactive_simplified to mock the new PromptSession-based interactive release selection prompt.
• Added response handler returning "9.1" when the "Select release" prompt is triggered.