Add td_library target to be able to include lce_ops.td

[panickal-xmos]

There are two changes :

• Adds a new td_library target to be able to include lce_ops.td externally. In current MLIR and Tensorflow upstream, all td files are defined as part of td_library targets. This will probably need to be done for all td files when compute-engine is upgraded to Tensorflow 2.7
• Adds a missing dependency to @llvm-project//mlir:QuantOps. Missing header dependencies are enforced when building with later bazel versions.

[panickal-xmos]

@lgeiger The MLIR test fail seems to be due to credentials. Can I do something to fix this?

[lgeiger]

The MLIR test fail seems to be due to credentials. Can I do something to fix this?

Sorry about that, it looks like there was a bug in the latest gcloud action release that broke our CI for PRs from forks. This is now fixed on main. @panickal-xmos can you rebase your PR onto main to fix the CI failure here?

[lgeiger]

Thank you very much for the PR.

When looking at the upstream build file is seems like build targets depend on the td_library instead of the *.td files directly. Could you change the dependency definitions in this file from ir/lce_ops.td to the new lce_ops_tf_file to make it consistent and to make sure that this build target is also tested properly on CI.

[lgeiger]

Looks great! Thanks for the PR 🎉