CMR-10122: Use EntryId returned by CMR for ID in CMR-STAC

[dmistry1]

Summary

This PR addresses two issues:

1. Removes the custom entryID generation that was previously based on shortName and version from the metadata.
2. Fixes a bug in platform processing where null instruments fields were causing errors.

Changes

• Now using the entryID provided directly from CMR instead of constructing it.
• Updated the platform processing logic to handle cases where the instruments field is null or undefined.

Testing

• Verified that collections are now being returned correctly in the SIT environment.
• Added unit tests to cover cases where instruments are null or undefined within platform data.

[codecov-commenter]

Codecov Report

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

Project coverage is 88.33%. Comparing base (a8db4bf) to head (e448f41).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #359 +/- ## ========================================== - Coverage 88.36% 88.33% -0.03% ========================================== Files 24 24 Lines 1169 1166 -3 Branches 257 258 +1 ========================================== - Hits 1033 1030 -3 Misses 136 136 ```

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