Bug fix: getRollups API, rollup jobs landing page

[annie3431]

Issue #, if available: N/A

Description of changes:

• getRollups API fix: modify format of node API to take optional parameters.
• Modify rollup jobs landing page to show fields correctly and have working sorting function.
• Clean up code

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[annie3431]

Output after running yarn run test:jest

Test Suites: 32 passed, 32 total
Tests:       167 passed, 167 total
Snapshots:   28 passed, 28 total
Time:        156 s, estimated 383 s
Ran all test suites.
✨  Done in 158.03s.

[annie3431]

Unit tests and E2E cypress tests have passed in previous workflow run: https://github.com/opendistro-for-elasticsearch/index-management-kibana-plugin/runs/1772682858