Rename jdkFile input to jdk-file with deprecated alias (#1083)

* Rename jdkFile input to jdk-file with deprecated alias

Add a standardized `jdk-file` input to match the lowercase-dash naming
used by every other action input. The camelCase `jdkFile` input is kept
as a deprecated alias: it still works, but emits a deprecation warning and
may be removed in a future release. `jdk-file` takes precedence when both
are provided.

Updates docs and the local-file e2e workflow (one case intentionally keeps
using the deprecated alias for coverage) and regenerates the dist bundles.

Fixes #1077

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

* docs: keep jdkFile in switching-to-v2 guide

The switching-to-v2 migration guide uses actions/setup-java@v2, which only supports the camelCase jdkFile input. Keep the new jdk-file spelling in current-version docs only.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
(cherry picked from commit 7dbccc66ee)

.github/workflows/e2e-local-file.yml

@@ -47,7 +47,7 @@ jobs:
         id: setup-java
         with:
           distribution: 'jdkfile'
-          jdkFile: ${{ runner.temp }}/${{ env.LocalFilename }}
+          jdk-file: ${{ runner.temp }}/${{ env.LocalFilename }}
           java-version: '11.0.0-ea'
           architecture: x64
       - name: Verify Java version
@@ -88,7 +88,7 @@ jobs:
         id: setup-java
         with:
           distribution: 'jdkfile'
-          jdkFile: ${{ runner.temp }}/${{ env.LocalFilename }}
+          jdk-file: ${{ runner.temp }}/${{ env.LocalFilename }}
           java-version: '11.0.0-ea'
           architecture: x64
       - name: Verify Java version
@@ -129,6 +129,7 @@ jobs:
         id: setup-java
         with:
           distribution: 'jdkfile'
+          # Intentionally uses the deprecated `jdkFile` alias to keep it covered.
           jdkFile: ${{ runner.temp }}/${{ env.LocalFilename }}
           java-version: '11.0.0-ea'
           architecture: x64