Bean jspTagLibraryResolver is created only if JSTL exists

Closes gh-888

Author: rainboyan

grace-plugin-gsp/build.gradle

@@ -8,7 +8,7 @@ dependencies {
     api project(":grace-web-mvc")
     api project(":grace-web-url-mappings")
     api project(":grace-web-gsp-taglib")
-    runtimeOnly(project(":grace-web-jsp"))
+    api project(":grace-web-jsp")
     api libs.spring.boot.autoconfigure
     annotationProcessor libs.spring.boot.autoconfigureProcessor
     annotationProcessor libs.spring.boot.configurationProcessor

grace-plugin-gsp/src/main/groovy/org/grails/plugins/web/GroovyPagesAutoConfiguration.java

@@ -209,7 +209,7 @@ public ServletRegistrationBean<GroovyPagesServlet> groovyPagesServlet() {
     }
 
     @Bean
-    @ConditionalOnClass(name = "org.grails.gsp.jsp.TagLibraryResolverImpl")
+    @ConditionalOnClass(name = "jakarta.servlet.jsp.jstl.core.Config")
     public TagLibraryResolver jspTagLibraryResolver(GroovyPagesProperties groovyPagesProperties,
             ObjectProvider<GrailsApplication> grailsApplicationObjectProvider) {
         TagLibraryResolverImpl tagLibraryResolver = new TagLibraryResolverImpl();