[filebeat][decode_cef] Add hyphen support

[vinit-chauhan]

Proposed commit message

This PR Adds support for - in the extension keys.
To do this, I have updated the cef.rl file and used go generate to generate parser.go and parser_recover.go.
Moreover, I have also added .ri file to gitignore file as they are intermediate files generated by regel.

Note: I've also updated the go generate directive to use regel-go as the latest version is not supporting -Z flag

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

Disruptive User Impact

Author's Checklist

• [ ]

How to test this PR locally

Related issues

• Closes [filebeat][decode_cef] Unable to parse fields containing hyphen - #40348

Use cases

Screenshots

Tests Passing

Logs

[mergify]

This pull request does not have a backport label.
If this is a bug or security fix, could you label this PR @vinit-chauhan? 🙏.
For such, you'll need to label your PR with:

• The upcoming major version of the Elastic Stack
• The upcoming minor version of the Elastic Stack (if you're not pushing a breaking change)

To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-v8./d.0 is the label to automatically backport to the 8./d branch. /d is the digit

[elasticmachine]

Pinging @elastic/sec-deployment-and-devices (Team:Security-Deployment and Devices)

[andrewkroh]

LGTM.

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b add_hyphen_support upstream/add_hyphen_support
git merge upstream/main
git push upstream add_hyphen_support

[vinit-chauhan]

Hey @andrewkroh - are we waiting for code owners' review?

[andrewkroh]

Yeah, I was giving the little time in case anyone from @elastic/sec-deployment-and-devices wanted to comment. I'll merge it after CI finishes today.

[andrewkroh]

run docs-build

[pkoutsovasilis]

Thank you for this contribution @vinit-chauhan! LGTM

[pkoutsovasilis]

run docs-build

[pkoutsovasilis]

/test