[LINTER] Fix some PHP linter rules
[LINTER] Fix some PHP linter rules

Summary:
Disable 2 generic rules:
  - The limit in cyclomatic complexity, whose value is not configurable.
Phabricator does not enforce this rule, and the hardcoded value is very
restrictive.
  - Enforce no space after a cast. Actually both 0 space and 1 space are
enforced, causing conflicts (there is no cast in the PHP codebase yet).

Test Plan:
  arc lint --everything
Should return no error.

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D3287

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