UISACQCOMP-215: ECS - Add isLoading prop for holdings

[alisher-epam]

Purpose

UISACQCOMP-215 - isLoading prop for holdings when fetching affiliation related locations to display loading indicator

Approach

Pre-Merge Checklist

Before merging this PR, please go through the following list and take appropriate actions.

• I've added appropriate record to the CHANGELOG.md
• Does this PR meet or exceed the expected quality standards?
  • Code coverage on new code is 80% or greater
  • Duplications on new code is 3% or less
  • There are no major code smells or security issues
• Does this introduce breaking changes?
  • If any API-related changes - okapi interfaces and permissions are reviewed/changed correspondingly
  • There are no breaking changes in this PR.

If there are breaking changes, please STOP and consider the following:

• What other modules will these changes impact?
• Do JIRAs exist to update the impacted modules?
  • If not, please create them
  • Do they contain the appropriate level of detail? Which endpoints/schemas changed, etc.
  • Do they have all they appropriate links to blocked/related issues?
• Are the JIRAs under active development?
  • If not, contact the project's PO and make sure they're aware of the urgency.
• Do PRs exist for these changes?
  • If so, have they been approved?

Ideally all of the PRs involved in breaking changes would be merged in the same day to avoid breaking the folio-testing environment. Communication is paramount if that is to be achieved, especially as the number of intermodule and inter-team dependencies increase.

While it's helpful for reviewers to help identify potential problems, ensuring that it's safe to merge is ultimately the responsibility of the PR assignee.

[github-actions]

Jest Unit Test Statistics

    1 files  ±0  212 suites  ±0   3m 53s ⏱️ -12s
534 tests ±0  532 ✔️ ±0  2 💤 ±0  0 ❌ ±0 
537 runs  ±0  535 ✔️ ±0  2 💤 ±0  0 ❌ ±0 

Results for commit 89a360b. ± Comparison against base commit 60b4433.

♻️ This comment has been updated with latest results.

[github-actions]

BigTest Unit Test Statistics

0 tests  ±0   0 ✔️ ±0   0s ⏱️ ±0s
0 suites ±0   0 💤 ±0 
0 files   ±0   0 ❌ ±0 

Results for commit 89a360b. ± Comparison against base commit 60b4433.

♻️ This comment has been updated with latest results.

[alisher-epam]

@folio-org/fe-tl-reviewers ^^ review please

[Terala-Priyanka]

Hey @alisher-epam
could you update changelog.md file and also address those couple of lint errors? I know the lint issues are not caused by your changes, but it is always good to clean them up.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
88.9% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud