[Dev][Wiki][Release] Fix and update Windows RC verify script

[asfimport]

There are some small issues with dev/release/verify-release-candidate.bat:

• Uses VS 2017 (2019 is current)

• Uses Python 3.6 (others use 3.8)

• conda create command uses relative paths to YML files; these cannot be found

• Uses wget (which doesn't come with Windows) but could just as easily use curl (which does)

  Fix these and update the instructions on the Confluence wiki accordingly: https://cwiki.apache.org/confluence/display/ARROW/How+to+Verify+Release+Candidates

  But first fix ARROW-11675

Reporter: Ian Cook / @ianmcook
Assignee: Ian Cook / @ianmcook

Related issues:

• [CI][C++] Resolve ctest failures on VS 2019 builds (depends upon)

PRs and other links:

• GitHub Pull Request #10136

_{Note: This issue was originally created as ARROW-12515. Please see the migration documentation for further details.}

[asfimport]

Alessandro Molina / @amol-:
@ianmcook is this one still valid?