[SITES-21939] Alt Text not persisting in Page Properties for Featured Image

[YahorC]

Adding additional check, in case we are opening dialog for Page component image section and in that case updating value of remoteFileReference in order to execute retrieveInstanceInfo correctly for page component and update alt text field in dialog

Q	A
Fixed Issues?	https://jira.corp.adobe.com/browse/SITES-22145
Patch: Bug Fix?
Minor: New Feature?
Major: Breaking Change?
Tests Added + Pass?	Yes
Documentation Provided	Yes (code comments and or markdown)
Any Dependency Changes?
License	Apache License, Version 2.0

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

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

Project coverage is 87.17%. Comparing base (d844a0e) to head (6b0b184).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2759 +/- ## ========================================= Coverage 87.17% 87.17% Complexity 2683 2683 ========================================= Files 235 235 Lines 7166 7166 Branches 1094 1094 ========================================= Hits 6247 6247 Misses 363 363 Partials 556 556 ```

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