Update data layer source name

[junqiu-lei]

Description

Update layer source name from Data source to Index pattern followed from https://github.com/opensearch-project/dashboards-maps/issues/584#issuecomment-1953280806

Issues Resolved

https://github.com/opensearch-project/dashboards-maps/issues/584

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[junqiu-lei]

Unrelated test failure due to OSD issue https://github.com/opensearch-project/OpenSearch-Dashboards/issues/5561#issuecomment-1952780312, adding --single-version=loose to resolve dependencies conflict.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 41.36%. Comparing base (811e8b0) to head (1b41da4).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #588 +/- ## ======================================= Coverage 41.36% 41.36% ======================================= Files 53 53 Lines 1789 1789 Branches 328 328 ======================================= Hits 740 740 Misses 1019 1019 Partials 30 30 ```

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[junqiu-lei]

One cypress test failed on CI but passed at my local, cut issue separately https://github.com/opensearch-project/dashboards-maps/issues/592

  Documents layer

We detected that the Electron Renderer process just crashed.

We have failed the current spec but will continue running the next spec.

This can happen for a number of different reasons.

If you're running lots of tests on a memory intense application.
  - Try increasing the CPU/memory on the machine you're running on.
  - Try enabling experimentalMemoryManagement in your config file.
  - Try lowering numTestsKeptInMemory in your config file during 'cypress open'.

You can learn more here:

https://on.cypress.io/renderer-process-crashed

  (Results)

  ┌────────────────────────────────────────────────────────────────────────────────────────────────┐
  │ Tests:        2                                                                                │
  │ Passing:      0                                                                                │
  │ Failing:      1                                                                                │
  │ Pending:      0                                                                                │
  │ Skipped:      1                                                                                │
  │ Screenshots:  0                                                                                │
  │ Video:        true                                                                             │
  │ Duration:     1 minute, 18 seconds                                                             │
  │ Spec Ran:     documentsLayer.cy.js                                                             │
  └────────────────────────────────────────────────────────────────────────────────────────────────┘

[VijayanB]

@junqiu-lei Do we need change in documentation website too? i remember sharing screenshot with select data source.

[junqiu-lei]

@junqiu-lei Do we need change in documentation website too? i remember sharing screenshot with select data source.

Sure, will raise PR to document repo if change needed.