Feature to exclude files in the check

[ernilambar]

Fix partially https://github.com/WordPress/plugin-check/issues/388

• --exclude-files argument added in plugin check command
• Filter wp_plugin_check_ignore_files added for ignoring files
• Added Behat tests and unit tests

[ernilambar]

cc: @swissspidy @mukeshpanchal27

[ernilambar]

@mukeshpanchal27 Merge conflict has been fixed.

[ernilambar]

@mukeshpanchal27 PR is synced with trunk and n.e.x.t has been removed as version.

[mukeshpanchal27]

@swissspidy Do you know why the Behat test failed?

[swissspidy]

As the error message says, the codecov token is missing, because this PR is originating from a fork. The tests are passing.

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Co-authored-by: ernilambar <[email protected]>
Co-authored-by: mukeshpanchal27 <[email protected]>
Co-authored-by: davidperezgar <[email protected]>
Co-authored-by: swissspidy <[email protected]>

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