Fix return value of `Jobs.list_jobs()` to return JSON

[Myrausman]

What It Does Resolved #27 Jobs.list_jobs() returns json value return json.dumps({"response": response_json})

Review Checklist I certify that I have:

• [X] tested my changes
• [x] added/updated automated tests
• [X] updated the changelog
• [X] followed the contribution guidelines

[codecov[bot]]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (09a10d1) 83.83% compared to head (6ba9c17) 83.84%.

Files	Patch %	Lines
src/zos_jobs/zowe/zos_jobs_for_zowe_sdk/jobs.py	50.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #251 +/- ## ======================================= Coverage 83.83% 83.84% ======================================= Files 34 34 Lines 2116 2117 +1 ======================================= + Hits 1774 1775 +1 Misses 342 342 ``` | [Flag](https://app.codecov.io/gh/zowe/zowe-client-python-sdk/pull/251/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zowe) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/zowe/zowe-client-python-sdk/pull/251/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zowe) | `83.84% <50.00%> (+<0.01%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zowe#carryforward-flags-in-the-pull-request-comment) to find out more.

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[zFernand0]

Hey @Myrausman, There are a few commits that need signed off (or perhaps removed from the history) 😋 Here are some steps that may help:

• https://github.com/zowe/zowe-client-python-sdk/pull/251/checks?check_run_id=21410525926

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Regarding:

zFernand0 should i update changelog as well ?

Yeah, I think it'd be good to have an entry for this fix 😋