feat(NODE-5746): allow runtime linking against system kerberos library

[addaleax]

E.g. GYP_DEFINES='kerberos_use_rtld=true' npm i --build-from-source can be used to enable this flag.

• add a CI job that exercises this build config
• add a CI job to run tests on RHEL8 that would fail without this

Description

What is changing?

Is there new documentation needed for these changes?

What is the motivation for this change?

Double check the following

• Ran npm run check:lint script
• Self-review completed using the steps outlined here
• PR title follows the correct format: type(NODE-xxxx)[!]: description
  • Example: feat(NODE-1234)!: rewriting everything in coffeescript
• Changes are covered by tests
• New TODOs have a related JIRA ticket

[addaleax]

Chatted with @dariakp and @baileympearson today, we decided that if adding a RHEL8 test comes with significant complexity, we could drop that requirement here, so this should be ready for review now.

(Unfortunately, the current test setup here seems to be fairly tied to Ubuntu 22.04 as the OS, I couldn’t manage to port it to RHEL/Rocky 8 or to split the test code from the server setup code, nor could I manage to get the mongodb server docker test images that our team maintains to run properly here.)

[nbbeeken]

Looks good, just some knowledge share questions for ya, thanks in advance!

[nbbeeken]

LGTM