add namespace to http_json external pillar method

[ctramnitz]

What does this PR do?

It adds a namespace option to the http_json ext_pillar method just like csvpillar

What issues does this PR fix or reference?

Fixes: #61335

Previous Behavior

When using external Pillar data using ext_pillar.http_json all retrieved data is always available in the pillar root.

New Behavior

When using the new namespace option while using ext_pillar.http_json all retrieved data is available in the specified subkey.

Merge requirements satisfied?

[NOTICE] Bug fixes or features added to Salt require tests.

• [x] Docs
• [x] Changelog - https://docs.saltproject.io/en/master/topics/development/changelog.html
• [ ] Tests written/updated http_json does not have a test yet - trivial change though

Commits signed with GPG?

No

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[garethgreenaway]

@ctramnitz Thanks for the PR, it looks like the pre-commit tests is failing above. You likely need to install the pre-commit hooks so those run and we'll need some tests for this change.

[whytewolf]

@ctramnitz Can you please fix the pre-commit issue? instructions on pre-commit can be found at https://docs.saltproject.io/en/latest/topics/development/contributing.html#pre-commit-and-nox-setup

[MKLeb]

There have been some modifications in this file which has led to conflicts, so could you rebase against those @ctramnitz? Also, a simple unit test for this will help it get across the line quicker.

[Ch3LL]

I was not able to push to your branch. I opened a new PR that includes your commits and test coverage here: https://github.com/saltstack/salt/pull/62883

@calebj @whytewolf @garethgreenaway if you could review that new PR and we can get it in for 3006.

[calebj]

@calebj ... if you could review that new PR and we can get it in for 3006.

Did you mean @MKLeb ?

[Ch3LL]

yes i did, apologies