GH-50383: [Release] Remove deprecated -f flag on conda create environment

[raulcd]

Rationale for this change

The Windows Wheels verification job is currently failing due to a change of API on the conda create call.

What changes are included in this PR?

Remove the deprecated -f flag.

Are these changes tested?

Yes, I have pushed the branch to the Apache Arrow repository instead of my fork to be able to manually trigger the workflow for the RC via workflow dispatch in order to validate the changes.

Are there any user-facing changes?

No

• GitHub Issue: [Release] Windows wheels verification jobs fails to set conda environment #50383

[github-actions]

⚠️ GitHub issue #50383 has been automatically assigned in GitHub to PR creator.

[raulcd]

I have pushed the branch to the Arrow repository (we can delete once merged) in order to be able to run worklfow_dispatch and test the verification job for the 25.0.0 RC1 tag, see:
https://github.com/apache/arrow/actions/runs/28772435960/job/85308832621

[Copilot]

Pull request overview

Updates the Windows release-candidate wheel verification batch script to be compatible with the updated conda create CLI by removing the deprecated -f flag that now requires a file argument, which was causing the workflow to fail.

Changes:

• Remove the deprecated -f argument from the conda create invocation in the Windows wheel verification script.

[kou]

+1

[raulcd]

I've pushed again to start the branch from one commit earlier so the Verification jobs are successful for the 25.0.0 RC1, otherwise the ODBC packages were missing:

• https://github.com/apache/arrow/actions/runs/28773070956/

I'll merge and remove this branch once the Workflow finishes successfully and will send the vote email for the RC.