UHF-8084: improve search performance

[Jussiles]

UHF-8084

What was done

• Use React lazy loading to split js bundle
• preprocess finetuning

How to install

• Make sure SOTE instance is up and running on latest dev branch.
  • git pull origin dev
  • make fresh
• Update the HDBT theme
  • composer require drupal/hdbt:dev-UHF-8084-improve-search-performance
• Update the Platform config module
  • composer require drupal/helfi_platform_config:dev-UHF-8084-improve-search-performance
• Run make drush-cr

How to test

Use these pages for testing:

https://helfi-sote.docker.so/fi/sosiaali-ja-terveyspalvelut/tapahtumahaun-testisivu
https://helfi-sote.docker.so/fi/sosiaali-ja-terveyspalvelut/senioripalvelut/palvelukeskukset
https://helfi-sote.docker.so/fi/sosiaali-ja-terveyspalvelut/senioripalvelut/palvelukeskukset/musiikkiryhmat-palvelukeskuksessa

• Check that event search is still working
• Check how long are the loading times on first load and when the cache is set. First load on Palvelukeskukset page can still be long.
• Check that code follows our standards
• Check related platform config PR: UHF-8084: improve search performance drupal-helfi-platform-config#445

Designers review

• This PR does not need designers review

Other PRs

• Link to other PR