feat: add some non "options" prefixed options

[ekacnet]

Adding option like filename and next-server for the match section. There is a bit of refactoring done as well that could be extended to avoid repeating the options stuff everywhere... It can be used in this kind of situation:

class "x32_uefi" {
    match if option clientarch = 00:06;
    filename "/tftpboot/bootia32.efi";
    next-server 1.2.3.4;
}

PR progress checklist (to be filled in by reviewers)

• [ ] Changes to documentation are appropriate (or tick if not required)
• [ ] Changes to tests are appropriate (or tick if not required)
• [ ] Reviews completed

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What type of PR is this?

Primary type

• [ ] [build] Changes related to the build system
• [ ] [chore] Changes to the build process or auxiliary tools and libraries such as documentation generation
• [ ] [ci] Changes to the continuous integration configuration
• [X] [feat] A new feature
• [ ] [fix] A bug fix
• [ ] [perf] A code change that improves performance
• [ ] [refactor] A code change that neither fixes a bug nor adds a feature
• [ ] [revert] A change used to revert a previous commit
• [ ] [style] Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc.)

Secondary type

• [X] [docs] Documentation changes
• [ ] [test] Adding missing or correcting existing tests

Does this PR introduce a BREAKING CHANGE?

No.

Related issues and/or pull requests

Describe the changes you're proposing

match sections of the DHCP config can have options name that don't start with options for instance filename or next-server

Pillar / config required to test the proposed changes

Debug log showing how the proposed changes work

Documentation checklist

• [ ] Updated the README (e.g. Available states).
• [ ] Updated pillar.example.

Testing checklist

• [ ] Included in Kitchen (i.e. under state_top).
• [ ] Covered by new/existing tests (e.g. InSpec, Serverspec, etc.).
• [ ] Updated the relevant test pillar.

Additional context

[ekacnet]

Issues on gentoo seems unrelated to my changes, it seems the test environment is not working as expected anymore.

[ekacnet]

@myii you seems to be active on other pull requests and on this repository, can you have a look at this PR ?

[sticky-note]

LGTM