ci: fix nightly and release (#3215)

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# Rationale for this change
Follow up to #3193
env vars does not play nice with windows os (because the default shell
is powershell). We need to set to bash so that env vars are interpreted
correctly

## Are these changes tested?
Yes
Ran on fork
nightly:
https://github.com/kevinjqliu/iceberg-python/actions/runs/23805622644
release:
https://github.com/kevinjqliu/iceberg-python/actions/runs/23805619712

## Are there any user-facing changes?

<!-- In the case of user-facing changes, please add the changelog label.
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Author: kevinjqliu

.github/workflows/nightly-pypi-build.yml

@@ -29,7 +29,7 @@ permissions:
 
 jobs:
   set-version:
-    if: github.repository == 'apache/iceberg-python'  # Only run for apache repo
+    if: github.repository == 'apache/iceberg-python' || github.event_name == 'workflow_dispatch' # Run on schedule for apache repo, or on manual dispatch from any repo
     runs-on: ubuntu-latest
     outputs:
       VERSION: ${{ steps.set-version.outputs.VERSION }}
@@ -55,6 +55,7 @@ jobs:
 
       - name: Debug version
         run: echo "Publishing version ${STEPS_SET_VERSION_OUTPUTS_VERSION}"
+        shell: bash
         env:
           STEPS_SET_VERSION_OUTPUTS_VERSION: ${{ steps.set-version.outputs.VERSION }}
 
@@ -65,6 +66,7 @@ jobs:
       version: ${{ needs.set-version.outputs.VERSION }}
   testpypi-publish:
     name: Publish to TestPypi
+    if: github.repository == 'apache/iceberg-python' # Only run for apache repo
     needs:
       - nightly-build
     runs-on: ubuntu-latest

.github/workflows/pypi-build-artifacts.yml

@@ -56,6 +56,7 @@ jobs:
         uses: astral-sh/setup-uv@5a095e7a2014a4212f075830d4f7277575a9d098 # v7.3.1
 
       - name: Set version with RC
+        shell: bash
         env:
           VERSION: ${{ inputs.VERSION }}
         run: uv version "$VERSION"

.github/workflows/python-release.yml

@@ -81,6 +81,7 @@ jobs:
           # Export variables for future steps
           echo "VERSION=$VERSION" >> $GITHUB_OUTPUT
           echo "RC=$RC" >> $GITHUB_OUTPUT
+        shell: bash
         env:
           GITHUB_EVENT_INPUTS_VERSION: ${{ github.event.inputs.version }}
           GITHUB_EVENT_INPUTS_RC: ${{ github.event.inputs.rc }}
@@ -89,6 +90,7 @@ jobs:
         run: |
           echo "Using Version: ${STEPS_VALIDATE_INPUTS_OUTPUTS_VERSION}"
           echo "Using RC: ${STEPS_VALIDATE_INPUTS_OUTPUTS_RC}"
+        shell: bash
         env:
           STEPS_VALIDATE_INPUTS_OUTPUTS_VERSION: ${{ steps.validate-inputs.outputs.VERSION }}
           STEPS_VALIDATE_INPUTS_OUTPUTS_RC: ${{ steps.validate-inputs.outputs.RC }}
@@ -113,6 +115,7 @@ jobs:
           enable-cache: false
 
       - name: Validate current pyiceberg version
+        shell: bash
         env:
           VERSION: ${{ needs.validate-inputs.outputs.VERSION }}
         run: |