[Backport 2.x]Add extension point in saved object management to register namespaces and show filter (#2656)

[zhongnansu]

Backport 8ac127a from #2656

Description

[Describe what this change achieves]

Issues Resolved

[List any issues this PR will resolve]

Check List

• All tests pass
  • yarn test:jest
  • yarn test:jest_integration
  • yarn test:ftr
• New functionality includes testing.
• New functionality has been documented.
• Update CHANGELOG.md
• Commits are signed per the DCO using --signoff

[cliu123]

@zhongnansu / @opensearch-project/opensearch-dashboards-core The test failures do not look related to the changes. Would you please re-run the failed jobs?
Integration test failure:

FAIL  packages/osd-config-schema/src/errors/schema_error.test.ts
  ● includes stack

    expect(received).toMatchSnapshot()

    Snapshot name: `includes stack 1`

    - Snapshot  - 1
    + Received  + 1

      Error: test
          at new SchemaError (packages/osd-config-schema/src/errors/schema_error.ts:35:5)
    -     at Object.<anonymous> (packages/osd-config-schema/src/errors/schema_error.test.ts:61:11)
    +     at Object.<anonymous> (packages/osd-config-schema/src/errors/schema_error.test.ts:59:11)
          at new Promise (<anonymous>)

      59 |     throw new SchemaError('test');
      60 |   } catch (e) {
    > 61 |     expect(cleanStack(e.stack)).toMatchSnapshot();
         |                                 ^
      62 |   }
      63 | });
      64 |

      at Object.<anonymous> (packages/osd-config-schema/src/errors/schema_error.test.ts:61:33)

BWC test failures:

2 failing

  1) check previously loaded data
       eCommerce Revenue Dashboard should function properly
         If set filter for gender, [eCommerce] Sales by Gender should show one gender:
     AssertionError: Timed out retrying after 60000ms: Expected to find element: `[class="label-text"]`, but never found it. Queried from element: <div.visualize.panel-content.panel-content--fullWidth>
      at Context.eval (http://localhost:5601/__cypress/tests?p=cypress/integration/without-security/check_loaded_data.js:154:89)

  2) check previously loaded data
       eCommerce Revenue Dashboard should function properly
         If filter out Women's Clothing, [eCommerce] Sales by Category should not show this category:
     AssertionError: Timed out retrying after 60000ms: Expected to find element: `[data-label="Men's Clothing"]`, but never found it. Queried from element: <div.visualize.panel-content.panel-content--fullWidth>
      at Context.eval (http://localhost:5601/__cypress/tests?p=cypress/integration/without-security/check_loaded_data.js:159:55)

[joshuarrrr]

I don't think the DCO failure is valid.