Add pipeline source annotations to container ops

[ptitzler]

This PR adds the elyra/pipeline-source metadata to KFP pipelines that are

• run from the pipeline editor,
• exported to YAML,
• exported to DSL Python, or
• created implicitly when a notebook is submitted.

For the scenarios listed above the elyra/pipeline-source property is set as follows:

• run from pipeline edior: the pipeline file name, e.g. mypipeline.pipeline
• exported to YAML: the pipeline file name, e.g. mypipeline.pipeline
• exported to DSL Python: the pipeline file name, e.g. mypipeline.pipeline
• created implicitly during notebook submission: static string, e.g. Generated for thisnotebook.ipynb

Additional PRs are required to attach the metadata for pipelines that are

• created implicitly when a Python script is submitted
• run from the CLI.

The PR

• requires Add support for pipeline source annotation kfp-notebook#86
• closes Expose pipeline file name in target runtime environment #1299
• closes Cannot run pipeline multiple times due to experiment creation error #1329
• contains code that needs to be forward fitted in Submit script feature #1330 (submitted Python script)

To test:

$ git clone https://github.com/ptitzler/elyra.git
$ cd elyra
$ git checkout i1299
$ make clean install
$ cd ..
$ git clone https://github.com/ptitzler/kfp-notebook.git
$ cd kfp-notebook
$ git checkout add-pipelinesource-annotation
$ pip uninstall -y kfp-notebook
$ make clean install
$ cd ..
$ export ELYRA_GITHUB_BRANCH=add-pipelinesource-annotation
$ export ELYRA_GITHUB_ORG=ptitzler
$ jupyter lab 

Developer's Certificate of Origin 1.1

   By making a contribution to this project, I certify that:

   (a) The contribution was created in whole or in part by me and I
       have the right to submit it under the Apache License 2.0; or

   (b) The contribution is based upon previous work that, to the best
       of my knowledge, is covered under an appropriate open source
       license and I have the right under that license to submit that
       work with modifications, whether created in whole or in part
       by me, under the same open source license (unless I am
       permitted to submit under a different license), as indicated
       in the file; or

   (c) The contribution was provided directly to me by some other
       person who certified (a), (b) or (c) and I have not modified
       it.

   (d) I understand and agree that this project and the contribution
       are public and that a record of the contribution (including all
       personal information I submit with it, including my sign-off) is
       maintained indefinitely and may be redistributed consistent with
       this project or the open source license(s) involved.

[elyra-bot]

Thanks for making a pull request to Elyra!

To try out this branch on binder, follow this link: