Add option to remove XRT from the build (#5114)
* Add --config=pjrt_only
* Backport TSL `trace` implementation and clean up
* Add missing proto deps
* Clean up dependencies
* Update comments
* Make linter happy
* Enable PJRT_ONLY=1 on CI
* Add missing XLA profiler backends
* Link CUDA plugin
* Revert "Enable PJRT_ONLY=1 on CI"
This reverts commit 081700de3e94f18e247c0954e344330c86b1214e.
* typo
