Add logic to skip files with more than 15000 lines

[ariskataoka]

TLDR; Some builds are currently timing out due to PRs that contain too large files.

This PR addresses issue 147.

If the PR contains files with more than 15000 lines, the lint scan and the phpcs will skip it.

• Adds logic to validate file size;
• Adds logic to modify the bot message;
• Adds logic to ignore files that have been skipped previously;

TODO:

• [ X ] Implement [new feature / logic]
• [ X ] Add/update unit-tests
• [ X ] Manual testing
• [ X ] Pull-Request with files with more than 15000 lines

Obs.:

1. Tested manually with lint and php-cs on and off: Only exceeded lines failed - cache tests ariskataoka/vipgoci-tests#10 (review)

2. The build testing has constantly been failing due to the GH API limit rate.

[ 2021-05-26T08:37:48+00:00 -- 0 ]  Ran out of request limits for GitHub, cannot continue without making further requests.; {
    "github_url": "https:\/\/api.github.com\/repos\/automattic\/vip-go-ci-testing\/pulls\/39\/commits?page=1&per_page=100",
    "x-ratelimit-remaining": "1",
    "x-ratelimit-limit": "60"
}

2. Original branch/PR here: Skip files when they are more than 15000 lines #176

[gudmdharalds]

This looks very good!

I left only a few comments inline.

[wpcomvip-vipgoci-bot]

phpcs scanning turned up:

🚫 1 error

---

This bot provides automated PHP linting and PHPCS scanning. For more information about the bot and available customizations, see our documentation.

Dismissing review as all inline comments are obsolete by now

[gudmdharalds]

Hi,

I reviewed and this PR is looking excellent.

There is just one small issue I noted, and when that is resolved this PR can be merged.

Can you have a look?

Thanks!