refactor: Use VaadinContext instead of ServletContext in PwaRegistry

[Artur-]

No description provided.

[sonarqubecloud]

Quality Gate passed

Issues
47 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

[github-actions]

Test Results

1 251 files   -  56  1 251 suites   - 56   1h 14m 42s ⏱️ +12s
8 764 tests  - 502  8 696 ✅  - 502  67 💤  - 1  0 ❌ ±0  1 🔥 +1 
9 227 runs   - 500  9 151 ✅  - 500  75 💤  - 1  0 ❌ ±0  1 🔥 +1 

For more details on these errors, see this check.

Results for commit 929bfba. ± Comparison against base commit 8265eac.

This pull request removes 502 tests.

com.vaadin.flow.component.littemplate.BundleLitParserTest ‑ parseTemplate
com.vaadin.flow.component.littemplate.BundleLitParserTest ‑ parseTemplateWithComments_commentsProperlyIgnored
com.vaadin.flow.component.littemplate.BundleLitParserTest ‑ parseTemplate_codeInRenderBeforeHtml_templateProperlyParsed
com.vaadin.flow.component.littemplate.BundleLitParserTest ‑ parseTemplate_codeWithHtmlAfterRender_templateProperlyParsed
com.vaadin.flow.component.littemplate.BundleLitParserTest ‑ parseTemplate_codeWithHtmlBeforeRender_templateProperlyParsed
com.vaadin.flow.component.littemplate.InjectableLitElementInitializerTest ‑ initializeElement_disabled_exceptionIsThrown
com.vaadin.flow.component.littemplate.InjectableLitElementInitializerTest ‑ initializeElement_setAttributeBinding_attributeIsIgnored
com.vaadin.flow.component.littemplate.InjectableLitElementInitializerTest ‑ initializeElement_setClass_classIsSetAsAttribute
com.vaadin.flow.component.littemplate.InjectableLitElementInitializerTest ‑ initializeElement_setDynamicValue_attributeIsIgnored
com.vaadin.flow.component.littemplate.InjectableLitElementInitializerTest ‑ initializeElement_setHref_hrefIsSetAsAttribute
…