feat(sdk)!: make CLI output consistent, readable, and usable

[connor-mccarthy]

Description of your changes:
This PR implements changes to the KFP CLI output.

There are three improvements:

1. The CLI always outputs something as a confirmation to the developer that their command worked.

2. The outputs are consistent in the readable (--output=table) mode. They consistently adhere to the docker/kubectl table style for improved readability.

Example (kfp run list -m 3):

ID                                    NAME    CREATED AT                 STATUS     STATE
fa504119-5cf7-4cb0-b6b6-5299cfda6bbf  my_run  2022-05-17T13:19:27+00:00  Succeeded  Available
087ee22f-c508-4bc7-b826-2b0bd3028c39  my_run  2022-05-17T01:32:14+00:00  Succeeded  Available
d27739e9-aa22-4bce-9060-8443d82b8af0  my_run  2022-05-17T01:32:06+00:00  Succeeded  Available

3. In JSON (--output=json) mode, the CLI merely passes all the JSON it receives from the backend on to stdout, instead of filtering and renaming fields. This makes the output much more complete/usable/consistent (e.g. can be parsed with jq and more fields are available) for CLI users, makes the response payloads from the different KFP API clients more consistent, and decreases ongoing maintenance costs for KFP developers.

Checklist:

• The title for your pull request (PR) should follow our title convention. Learn more about the pull request title convention used in this
  repository.

[google-oss-prow]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[connor-mccarthy]

/test all

[chensun]

/lgtm

Thanks @connor-mccarthy. I think this change worth having a release note entry.

[connor-mccarthy]

/lgtm

Thanks @connor-mccarthy. I think this change worth having a release note entry.

Thanks, @chensun. Done. I also took this opportunity to add two other CLI-related release notes from PRs merged since the last release.

[chensun]

/lgtm
/approve

Thanks!

[google-oss-prow]

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This pull-request has been approved by: chensun

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