fix: add support for pluginDownloadURL from schema.json (#1365)

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# Description

This PR will fix the issue described in #1109.

updated `build.gradle` code with `info.metaClass.server`


![image](https://github.com/pulumi/pulumi-java/assets/14177833/f426a845-b078-45d9-b6d9-5a1866fb993a)

generated `plugin.json`:


![image](https://github.com/pulumi/pulumi-java/assets/14177833/a6820aea-2fad-4156-b5c4-b549366f6fd0)


<!--- Please include a summary of the change and which issue is fixed.
Please also include relevant motivation and context. -->

Fixes #1109

## Checklist

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- [ ] I have added tests that prove my fix is effective or that my
feature works
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- [ ] I have updated the
[CHANGELOG-PENDING](https://github.com/pulumi/pulumi/blob/master/CHANGELOG_PENDING.md)
file with my change
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---------

Co-authored-by: Thomas Meckel <[email protected]>
Co-authored-by: Anton Tayanovskyy <[email protected]>

CHANGELOG_PENDING.md

@@ -1,3 +1,5 @@
 ### Improvements
 
+- Codegen: pluginDownloadURL is now supported through the automatically generated build.gradle
+
 ### Bug Fixes

pkg/codegen/java/build.gradle.template

@@ -77,6 +77,9 @@ def genPulumiResources = tasks.register('genPulumiResources') {
         def info = new Object()
         info.metaClass.resource = true
         info.metaClass.name = "{{ .ArtifactID }}"
+        {{- if .PluginDownloadURL }}
+        info.metaClass.server = "{{ .PluginDownloadURL }}"
+        {{- end }}
         info.metaClass.version = resolvedVersion
         def infoJson = new groovy.json.JsonBuilder(info).toPrettyString()
         new File(outDir, "plugin.json").text = infoJson
@@ -192,4 +195,4 @@ if (signingKey) {
         useInMemoryPgpKeys(signingKey, signingPassword)
         sign publishing.publications.mainPublication
     }
-}
+}

pkg/codegen/java/templates_gradle.go

@@ -83,6 +83,7 @@ type gradleTemplateContext struct {
 	GradleNexusPublishPluginEnabled bool
 	GradleNexusPublishPluginVersion string
 	GradleTestJUnitPlatformEnabled  bool
+	PluginDownloadURL               string
 }
 
 func newGradleTemplateContext(
@@ -95,6 +96,7 @@ func newGradleTemplateContext(
 		ProjectURL:                     pkg.Repository,
 		ProjectGitURL:                  formatGitURL(pkg.Repository),
 		GradleTestJUnitPlatformEnabled: packageInfo.GradleTest == "JUnitPlatform",
+		PluginDownloadURL:              pkg.PluginDownloadURL,
 	}
 
 	if packageInfo.GradleNexusPublishPluginVersion != "" {