Ignore max_line_length property unless max-line-length rule is enabled

[paul-dingemans]

IMPORTANT: Potential breaking change for API Consumers that provide the max_line_length property but not enabling/providing the max-line-length rule of the Ktlint standard rule set.

Description

Ignore max_line_length property unless max-line-length rule is enabled. Align EditorConfig settings for max_line_length and enable/disabling the max-line-length rule

Rules should only consider the maximum line length in case property max_line_length is set to a value between 0 and MAX_INTEGER - 1, and the max-line-length rule is provided to the KtLintRuleEngine, and the max-line-length rule is enabled.

It should not be enforced that property max_line_length should have value unset or off whenever the max-line-length rule is disabled, or not provided to the KtLintRuleEngine. This property is also used by IntelliJ IDEA to display the right margin where lines should be wrapped. A user should be able to disable enforce max line length wrapping in ktlint, while still seeing the margin line in the editor.

Closes #2743

Checklist

Before submitting the PR, please check following (checks which are not relevant may be ignored):

• Commit message are well written. In addition to a short title, the commit message also explain why a change is made.
• At least one commit message contains a reference Closes #<xxx> or Fixes #<xxx> (replace<xxx> with issue number)
• Tests are added
• KtLint format has been applied on source code itself and violations are fixed
• PR title is short and clear (it is used as description in the release changelog)
• PR description added (background information)

Documentation is updated. See difference between snapshot and release documentation

• Snapshot documentation in case documentation is to be released together with a code change
• Release documentation in case documentation is related to a released version of ktlint and has to be published as soon as the change is merged to master