cvat Switch to deploying GitHub Pages via an action

Motivation and context

Currently, we're using the original deployment method of pushing to the gh-pages branch. Since the actual content is generated via a workflow, we can skip the pushing, and just publish directly to Pages from the workflow.

This has the following benefits:

It should be a bit faster, since we're skipping a step.
It makes the repository lighter (provided we delete the gh-pages branch).
It lets you preview what pages will be deployed after a PR, since they are published as a workflow artifact.
It lets us avoid using a 3rd-party action.

Note that actions/deploy-pages has no equivalent of the cname parameter. Instead, the domain name is set in GitHub's repository settings.

How has this been tested?

Checklist

[x] I submit my changes into the develop branch
~~[ ] I have created a changelog fragment~~
~~[ ] I have updated the documentation accordingly~~
~~[ ] I have added tests to cover my changes~~
~~[ ] I have linked related issues (see GitHub docs)~~

License

[x] I submit my code changes under the same MIT License that covers the project. Feel free to contact the maintainers if that's a concern.

May 02 '25 10:05 SpecLad

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarQube Cloud

May 02 '25 10:05 sonarqubecloud[bot]

Codecov Report

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

Project coverage is 71.80%. Comparing base (5aa5fd0) to head (891c70a). Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #9386   +/-   ##
========================================
  Coverage    71.80%   71.80%           
========================================
  Files          441      441           
  Lines        46389    46389           
  Branches      3960     3960           
========================================
+ Hits         33308    33310    +2     
+ Misses       13081    13079    -2

Components	Coverage Δ
cvat-ui	`77.70% <ø> (+<0.01%)`	:arrow_up:
cvat-server	`67.13% <ø> (ø)`

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