[core][dashboard] Add Pg Id and Format Required Resources in /logical/actors Response

[MengjinYan]

Problem to Solve

In issue #45658, we found that the placement group id and the required resources are not displayed correctly in the actor UI tab in the dashboard. To be specific:

• The "Placement group ID" column content is missing
• The "Required resources" column shows resources with pg ids and bundle entries as well

Root Cause

With investigation, we found the root cause of the issue is that:

• The dashboard calls "/logical/actors" to get the actor information to display
• The response content of the above REST API doesn't contain the placement group id field and the required resources are not formatted correctly
• Therefore, the dashboard fails to the display the corresponding content correctly

Changes in the PR

• Include placementGroupId in the keys to be translated/preserved in the actor_table_data_to_dict function so that the pg id can be included in the content of the REST API response
• Leverage the parse_pg_formatted_resources_to_original function to reformatted the required resources before sending the REST API response
• Test logic added in test_actors tests to verify the logic of setting the placement group id as well as the correctly formatted required resources

Related issue number

#45658

Checks

• I've signed off every commit(by using the -s flag, i.e., git commit -s) in this PR.
• I've run scripts/format.sh to lint the changes in this PR.
• I've included any doc changes needed for https://docs.ray.io/en/master/.
  • I've added any new APIs to the API Reference. For example, if I added a
    method in Tune, I've added it in doc/source/tune/api/ under the
    corresponding .rst file.
• I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/
• Testing Strategy
  • Unit tests
  • Release tests
  • This PR is not tested :(