feat(ExternalService): add skip hostname verification for external services

[alparslanavci]

The external services were automatically doing verification for hostnames on TLS certificates when TLS was enabled. This update adds a flag to the external service definition to skip this verification. By default, it is false.

Fix #7121

Checklist prior to review

• Link to relevant issue as well as docs and UI issues --
• This will not break child repos: it doesn't hardcode values (.e.g "kumahq" as a image registry) and it will work on Windows, system specific functions like syscall.Mkfifo have equivalent implementation on the other OS --
• Tests (Unit test, E2E tests, manual test on universal and k8s) --
• Do you need to update UPGRADE.md? --
• Does it need to be backported according to the backporting policy? (this GH action will add "backport" label based on these file globs, if you want to prevent it from adding the "backport" label use no-backport-autolabel label) --
• Do you need to explicitly set a > Changelog: entry here or add a ci/ label to run fewer/more tests?

[lukidzi]

Thanks for the contribution. I left a comment to change the field number

[alparslanavci]

Thanks for the review, @lukidzi!

I pushed a commit to update it. I'll appreciate it if you can have a look at it again. After the merge, I'll also send a PR to the docs repo.

[alparslanavci]

Hi @lukidzi, should I need to do anything for this PR? Please let me know if so!

[lukidzi]

Merged, thanks for the contribution 👍 @alparslanavci