Use HTTP POST for Matomo 5 API

[ryanfb]

Fixes

Fixes #6769

Summary

Matomo 5 (released Dec 2023) changes how auth tokens work when using the reporting API: https://developer.matomo.org/changelog#usage-of-authentication-tokens

Anyone setting up a new auth token in Matomo 5 (e.g., to support Matomo analytics in a Hyrax app) will by default have it restricted to POST, which would make it not work with Hyrax.

Guidance for testing, such as acceptance criteria or new user interface behaviors:

• Fresh Matomo 5 API tokens with POST restriction should now work

Type of change (for release notes)

• notes-bugfix HTTP POST now used for Matomo API calls

Changes proposed in this pull request:

• switch from GET to POST for all Matomo API calls

@samvera/hyrax-code-reviewers

[ryanfb]

NB: this is likely to start affecting all Hyrax users who use Matomo for statistics. We ran across this when an expired Matomo key for our Hyrax app stopped view/download statistics from displaying correctly, and the re-issued "secure" auth token being restricted to POST meant it needed this corresponding fix.

[github-actions]

Test Results

    1 files   -     12      1 suites   - 12   0s ⏱️ - 2h 39m 5s
1 743 tests  -  5 092  1 743 ✅  -  4 793  0 💤  - 299  0 ❌ ±0 
1 743 runs   - 16 362  1 743 ✅  - 15 882  0 💤  - 480  0 ❌ ±0 

Results for commit c922e22. ± Comparison against base commit f58d8e0.

♻️ This comment has been updated with latest results.