Encoding not honored for spool files

[VitGottwald]

Describe the bug

When I specify encoding in my z/OSMF profile it is honored for dataset retrieval/upload but not for spool file retrieval.

This is most likely because the following call does not take encoding into account

zowe-explorer-vscode/packages/zowe-explorer/src/trees/job/JobActions.ts

Line 177 in b43eccb

await ZoweExplorerApiRegister.getJesApi(job.getProfile()).downloadSpoolContent({

To Reproduce

1. Set encoding in zosmf profle to ibm278
2. Create a PDS member containing a nordic national character like Ö
3. Print it to spool - e.g. via IEBGENER
4. Open the PDS member and see Ö
5. Open the spool file and see @

Expected behavior
Encoding from zosmf profile is honored both for dataset and spool operations.

[github-actions]

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[VitGottwald]

The situation that I ran into this was when looking at a listing of a COBOL program that uses a nordic encoding.