BREAKING CHANGE: Use explicit version for release (#24)

This was missed as part of pulumi/ci-mgmt#900

We no longer use pulumictl to re-calculate the version multiple times
throughout a workflow. Instead, we use the
`pulumi/provider-version-action` to calculate the version, and prefer
passing the version around as an explicit variable to ensure it never
gets changed.

The new version is slightly different to the one generated by pulumictl
- using a shorthash of 7 characters rather than 8.

1. Add a new required input for `version` (BREAKING CHANGE).
2. Set the version input to the `PROVIDER_VERSION` which is the env name
we use in all other jobs for the version of the _provider_ - for the SDK
release sub-jobs which need it.
3. During the Java SDK publish sub-job, set the java-specific
`PACKAGE_VERSION` env variable.

## Breaking Change Rational

We always reference the exact version of this action and we've made
previous breaking changes, so it's better to avoid the complexity for
backward compatibility as we'll need to update all call sites with the
new version anyway.

action.yml

@@ -1,6 +1,9 @@
 name: 'Pulumi Package publisher'
 description: 'A GitHub Action that publishes provider SDKs'
 inputs:
+  version:
+    description: The version of the provider being published.
+    required: true
   sdk:
     description: |
       The name of the language SDK being published.
@@ -42,9 +45,6 @@ runs:
       uses: actions/checkout@v3
       with:
         repository: ${{ github.repository }}
-    - name: Unshallow clone for tags
-      run: git fetch --prune --unshallow --tags
-      shell: bash
     - name: Install Go
       uses: actions/setup-go@v3
       with:
@@ -56,7 +56,6 @@ runs:
     - name: Install Pulumi CLI
       uses: pulumi/action-install-pulumi-cli@v2
 
-
     # `uses:` statements do not support expressions
     # (https://github.com/actions/runner/issues/895), so this is invalid:
     #
@@ -86,3 +85,5 @@ runs:
     - name: Java - Publish to Maven
       if: (contains(inputs.sdk, 'java') || (contains(inputs.sdk, 'all') && !contains(inputs.sdk, '!all'))) && !contains(inputs.sdk, '!java')
       uses: ./.pulumi-package-publish/lang/java
+      env:
+        PROVIDER_VERSION: ${{ inputs.version }}

lang/java/action.yml

@@ -23,13 +23,11 @@ runs:
       run: tar -zxf ${{github.workspace}}/sdk/java.tar.gz -C
         ${{github.workspace}}/sdk/java
       shell: bash
-    - name: Set PACKAGE_VERSION to Env
-      run: echo "PACKAGE_VERSION=$(pulumictl get version --language generic)" >>
-        $GITHUB_ENV
-      shell: bash
     - name: Publish Java SDK
       continue-on-error: true
       uses: gradle/gradle-build-action@9b814496b50909128c6a52622b416c5ffa04db49
+      env:
+        PACKAGE_VERSION: ${{ env.PROVIDER_VERSION }}
       with:
         arguments: publishToSonatype closeAndReleaseSonatypeStagingRepository
         build-root-directory: ./sdk/java