Update to JDK 25 (release = 17)

This commit updates the build to use JDK 25 while remaining compatable with JDK 17.

Note that we must update our JAAS related tests to use release=25 due to the disabling of
the Security Manager. See
https://docs.oracle.com/en/java/javase/25/security/security-manager-is-permanently-disabled.html

Closes gh-18512

.github/workflows/check-snapshots.yml

@@ -18,10 +18,8 @@ jobs:
     strategy:
       matrix:
         include:
-          - java-version: 21-ea
-            toolchain: 21
-          - java-version: 17
-            toolchain: 17
+          - java-version: 25
+            toolchain: 25
     with:
       java-version: ${{ matrix.java-version }}
       test-args: --refresh-dependencies -PforceMavenRepositories=snapshot,https://oss.sonatype.org/content/repositories/snapshots -PisOverrideVersionCatalog -PtestToolchain=${{ matrix.toolchain }} -PspringFrameworkVersion=7.+ -PreactorVersion=2025.+ -PspringDataVersion=2025.+ --stacktrace

.github/workflows/continuous-integration-workflow.yml

@@ -21,7 +21,7 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, windows-latest ]
-        jdk: [ 17 ]
+        jdk: [ 25 ]
     with:
       runs-on: ${{ matrix.os }}
       java-version: ${{ matrix.jdk }}

.github/workflows/gradle-wrapper-upgrade-execution.yml

@@ -20,10 +20,10 @@ jobs:
           git config --global user.email 'github-actions[bot]@users.noreply.github.com'
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Set up JDK 17
+      - name: Set up JDK 25
         uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: '25'
           distribution: 'temurin'
       - name: Set up Gradle
         uses: gradle/gradle-build-action@v2

.github/workflows/pr-build-workflow.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Set up gradle
         uses: spring-io/spring-gradle-build-action@v2
         with:
-          java-version: '17'
+          java-version: '25'
           distribution: 'temurin'
       - name: Build with Gradle
         run: ./gradlew clean build -PskipCheckExpectedBranchVersion --continue --scan
@@ -28,7 +28,7 @@ jobs:
       - name: Set up gradle
         uses: spring-io/spring-gradle-build-action@v2
         with:
-          java-version: '17'
+          java-version: '25'
           distribution: 'temurin'
       - name: Run Antora
         run: ./gradlew -PbuildSrc.skipTests=true :spring-security-docs:antora