build: Add default value for argument 'TRITON_REPO_ORGANIZATION' from sdk Dockerfile

[zhanga5]

What does the PR do?

Add default value for argument TRITON_REPO_ORGANIZATION from sdk Dockerfile. Otherwise it breaks manual build described from https://github.com/triton-inference-server/server/blob/main/docs/customization_guide/test.md#build-sdk-image. This issue seems introduced by PR #6934

And add instruction about clone perf analyzer repo for SDK image build. It's new added to sdk Dockerfile by #7449. And escape angle brackets surrounded strings properly.

Checklist

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• build

Related PRs:

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Where should the reviewer start?

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Test plan:

Manual build sdk docker image that's described from https://github.com/triton-inference-server/server/blob/main/docs/customization_guide/test.md#build-sdk-image

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[fpetrini15]

LGTM!