refactor: Move DevBundleUtils to internal

[Artur-]

Nothing relates to the frontend build there

[sonarqubecloud]

Quality Gate passed

Issues
206 New issues
1 Accepted issue

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

1 256 files   -  53  1 256 suites   - 53   1h 16m 32s ⏱️ + 1m 24s
8 771 tests  - 453  8 702 ✅  - 454  67 💤  - 1  1 ❌ +1  1 🔥 +1 
9 234 runs   - 451  9 157 ✅  - 452  75 💤  - 1  1 ❌ +1  1 🔥 +1 

For more details on these failures and errors, see this check.

Results for commit 2ea0e98. ± Comparison against base commit e68ddbd.

This pull request removes 492 and adds 39 tests. Note that renamed tests count towards both.

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
…

com.vaadin.flow.internal.BundleUtilsTest ‑ frontendImportVariantsIncluded
com.vaadin.flow.internal.BundleUtilsTest ‑ frontendInTheMiddleNotTouched
com.vaadin.flow.internal.BundleUtilsTest ‑ isPreCompiledProductionBundle_usesCachedStats
com.vaadin.flow.internal.BundleUtilsTest ‑ jarImportVariantsIncluded
com.vaadin.flow.internal.BundleUtilsTest ‑ loadStatsJson_cachedResultIsConsistent
com.vaadin.flow.internal.BundleUtilsTest ‑ loadStatsJson_cachesResult_returnsSameInstance
com.vaadin.flow.internal.BundleUtilsTest ‑ themeVariantsFromJarHandled
com.vaadin.flow.internal.BundleUtilsTest ‑ themeVariantsHandled
com.vaadin.flow.internal.CssBundlerTest ‑ conditionalImportsNotHandled
com.vaadin.flow.internal.CssBundlerTest ‑ differentImportSyntaxesSupported
…