Don't pass -ea suffix into Gradle as the toolchain version

This commit is similar to what we had to do for Java 22-ea.

Given our actions have changed quite a bit, this commit replaces the
"java-distribution" parameter by a "java-early-access" parameter. When
set, it automatically switches the distribution to temurin as well as
applying the same handling of the Java version as in b8a6cab.

See gh-41698

.github/workflows/ci.yml

@@ -24,8 +24,8 @@ jobs:
             toolchain: true
           - version: 22
             toolchain: true
-          - version: 23-ea
-            distribution: temurin
+          - version: 23
+            early-access: true
             toolchain: true
         exclude:
           - os:
@@ -46,7 +46,7 @@ jobs:
         uses: ./.github/actions/build
         with:
           java-version: ${{ matrix.java.version }}
-          java-distribution: ${{ matrix.java.distribution || 'liberica' }}
+          java-early-access: ${{ matrix.java.early-access || 'false' }}
           java-toolchain: ${{ matrix.java.toolchain }}
           develocity-access-key: ${{ secrets.GRADLE_ENTERPRISE_SECRET_ACCESS_KEY }}
       - name: Send Notification