[CI] Prepare for 3.8.0-RC1 release (#24422)

Prepare for releasing 3.8.0-RC1 artifacts by adjusting how artifacts are
published.
We don't introduce a full refactor by switching to use dedicated
environments and `release-maven-artifacts` workflow yet. Instead we're
only adjusting existing, battle-tested workflow to publish artifacts
using new variants of projects to reduce risks due too many moving
parts.
The CI refactor would be introduced for 3.8.1 releases after testing it
first on nightlies in a full workflow (including execution of tests
which is now missing)

Additional minor adjustments: 
- disable publishing to WinGet - this workflow has never succeeded and
requires creation of first release manually
- Switch homepage from GitHub repository to `scala-lang.org` website

Author: WojciechMazur

.github/workflows/ci.yaml

@@ -219,14 +219,15 @@ jobs:
       - name: Check compiler version
         shell: bash
         run : |
-          version=$(./project/scripts/sbt "print scala3-compiler-bootstrapped/version" | tail -n1)
+          version=$(./project/scripts/sbt "print scala3-compiler-bootstrapped-new/version" | tail -n1)
           echo "This build version: ${version}"
           if [ "${version}" != "${{ env.RELEASE_TAG }}" ]; then
             echo "Compiler version for this build '${version}', does not match tag: ${{ env.RELEASE_TAG }}"
             exit 1
           fi
 
       - name: Prepare the SDKs
+        if: false # TODO: Requires changes to dist targets, to be done before stable release
         shell: bash
         run : |
           prepareSDK() {
@@ -253,11 +254,13 @@ jobs:
           prepareSDK "-x86_64-pc-win32"      "dist-win-x86_64"    "./dist/win-x86_64/"
 
       - name: Download MSI package
+        if: false # TODO: Requires changes to dist targets, to be done before stable release
         uses: actions/download-artifact@v6
         with:
           name: scala.msi
           path: .
       - name: Prepare MSI package
+        if: false # TODO: Requires changes to dist targets, to be done before stable release
         shell: bash
         run: |
           msiInstaller="scala3-${{ env.RELEASE_TAG }}.msi"
@@ -285,13 +288,14 @@ jobs:
           --latest=${{ !contains(env.RELEASE_TAG, '-RC') }} \
           --prerelease=${{ contains(env.RELEASE_TAG, '-RC') }} \
           --verify-tag ${{ env.RELEASE_TAG }} \
-          scala3-${{ env.RELEASE_TAG }}*.zip \
-          scala3-${{ env.RELEASE_TAG }}*.tar.gz \
-          scala3-${{ env.RELEASE_TAG }}*.sha256 \
-          scala3-${{ env.RELEASE_TAG }}.msi
+          # TODO: dist packaging for 3.8.0 stable release
+          # scala3-${{ env.RELEASE_TAG }}*.zip \
+          # scala3-${{ env.RELEASE_TAG }}*.tar.gz \
+          # scala3-${{ env.RELEASE_TAG }}*.sha256 \
+          # scala3-${{ env.RELEASE_TAG }}.msi
 
       - name: Publish Release
-        run: ./project/scripts/sbtPublish ";project scala3-bootstrapped ;publishSigned ;sonaUpload"
+        run: ./project/scripts/sbtPublish ";project scala3-bootstrapped-new ;publishSigned ;sonaUpload"
 
   build-msi-package:
     uses: ./.github/workflows/build-msi.yml

.github/workflows/releases.yml

@@ -32,6 +32,7 @@ jobs:
 
   publish-winget:
     uses: ./.github/workflows/publish-winget.yml
+    if: false # TODO: Requires setting up initial WinGet package
     with:
       version: ${{ inputs.version }}
     secrets:

project/Build.scala

@@ -186,6 +186,7 @@ object Build {
    */
   val stdlibBootstrappedVersion = "2.13.16"
 
+  val homepageUrl = "https://scala-lang.org/"
   val dottyOrganization = "org.scala-lang"
   val dottyGithubUrl = "https://github.com/scala/scala3"
   val dottyGithubRawUserContentUrl = "https://raw.githubusercontent.com/scala/scala3"
@@ -3784,15 +3785,15 @@ object Build {
       id.withExtraAttributes(id.extraAttributes + line)
     },
     Test / publishArtifact := false,
-    homepage := Some(url(dottyGithubUrl)),
+    homepage := Some(url(homepageUrl)),
     licenses += (("Apache-2.0", url("https://www.apache.org/licenses/LICENSE-2.0"))),
     scmInfo := Some(ScmInfo(url(dottyGithubUrl), "scm:git:git@github.com:scala/scala3.git")),
     developers := List(
       Developer(
         id = "scala",
         name = "The Scala Team",
         email = "security@scala-lang.org",
-        url = url("https://scala-lang.org")
+        url = url(homepageUrl)
       )
     ),
   )