Make xpack.actions.rejectUnauthorized setting work

[mikecote]

Resolves #87047

In this PR, I'm doing a few changes to fix the problem. The general purpose of each commit is as follows:

1. 78b7e2e: I'm removing the TS type ActionsConfigType because it is a duplicate / subset of ActionsConfig that wasn't needed. This allowed me to add more functionality to the configurationUtilities in following commits.
2. 08ebe63: This commit fixes the problem by passing configurationUtilities down to the getProxyAgents function from every possible path. The configurationUtilities has a new function isRejectUnauthorizedCertificatesEnabled .
3. 1a17f8d: Since passing proxySettings was happening at the same places that configurationUtilities was, I moved the access to proxySettings to configurationUtilities.
4. a84503d: I realized checking error.isAxiosError didn't always work (ex: when it mentions missing kbn-xsrf header) so I changed it to error.code.

[elasticmachine]

Pinging @elastic/kibana-alerting-services (Team:Alerting Services)

[YulNaumenko]

LGTM

[pmuellr]

LGTM

Seems like we could build a function test for this - create a new https server with a newly created self-signed cert (with a loooong lifetime), that just has one endpoint that we can test with webhook. Then execute the webhook, with and without the rejectUnauthorized setting - should get one to work and the other to fail. Obviously set it up to use the proxy we're testing with, in security_and_spaces . :-)

[mikecote]

@pmuellr I went ahead and added a functional test in this commit (af638a3). I made it re-use the dev certs so it's one less thing to expire 🙂 I added it to the spaces_only suite because the fix is for non-proxy scenarios (the other suite uses a proxy for everything). Let me know what you think of the approach? 🙏

[mikecote]

@elasticmachine merge upstream

[mikecote]

@elasticmachine merge upstream

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: b9414e3

Metrics [docs]

✅ unchanged

History

• 💔 Build #101314 failed d6be507
• 💔 Build #101256 failed 0337bbd
• 💔 Build #101253 failed af638a3
• 💚 Build #99969 succeeded a84503d
• 💚 Build #99743 succeeded c5f6eb7

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@elasticmachine merge upstream