feat(integration): Add jwt token getter to core http action

[topher-lo]

Use-case

• Limacharlie API auth requires two calls: first call gets JWT token, second call makes the operational API call.
• Current httpx action does not support jwt calls without logging jwt to outputs in another httpx core action

Alternatives considered

• Write a Limacharlie integration to the registry. Decided against as there are too many Limacharlie APIs.
• I want to give flexibility to the end user to modify the templated http action without contacting support / writing python and opening a PR