Add support for @infection-ignore-all annotation

[sanmai]

See #1231

This PR:

• Adds a possibility to ignore an entire statement by commenting it with @infection-ignore-all
• Covered by an E2E test
• Covered by unit tests
• Doc PR: PR description can be used verbatim

Give this example Infection won't mutate or even look at anything inside this function:

/** @infection-ignore-all */
public function doSomethingNastyButCostlyToRefactor() {

}

Likewise, given this annotation Infection won't consider anything in this loop:

/** @infection-ignore-all */
foreach ($foo as $bar) {
    // 
}

[maks-rafalko]

LGTM

[sanmai]

@maks-rafalko This should auto-merge upon approval.

[maks-rafalko]

👍

let's see how automerging works

[maks-rafalko]

hm... it says there was an error, but no information about it

[sanmai]

Can't get it working too.

[maks-rafalko]

@sanmai are you able to create a PR for docs please?

[sanmai]

Where do you think will be the best place to put it?

[maks-rafalko]

Probably, somewhere in the Usage article. There we have information about other annotations like @codeCoverageIgnore.

[sanmai]

I'm not exactly sure these @codeCoverageIgnore annotations work as advertised, looking at the code. Let me check that they do, and if they don't we'll remove them and replace with @infection-ignore-all in this very section.