Update image tag used for "no Dockerfile" containerapp up scenario

[cormacpayne]

This PR aims to update the Oryx build image tag used by the az containerapp up command to construct a Dockerfile for the user when the provided --source code does not contain a Dockerfile itself.

The new image tag will enable the latest versions of supported Oryx platform binaries to be pulled down dynamically when building the --source, as well as enable telemetry on the Oryx end.

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Related command

az containerapp up

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• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally?

For new extensions:

- [ ] My extension description/summary conforms to the Extension Summary Guidelines.

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[cormacpayne]

CC: @StrawnSC

[yonzhan]

containerapp

[StrawnSC]

Blocked until #5894 is merged

[zhoxing-ms]

@StrawnSC Since #5894 was merged, could we merge this PR now?

[StrawnSC]

@cormacpayne can we go ahead and close this since this change will go out in #5955?

[cormacpayne]

@StrawnSC thanks for the heads up!