Warn on suffix-less integer literals outside Int64's range

[HertzDevil]

Implements #8373 (comment). The warnings are generated in a few places:

• when a source is compiled, formatted, or interpreted
• whenever a macro is interpolated and new code is to be parsed
• when a line of source is accepted from an interpreter session
• when the macro method parse_type returns (because generic type arguments may contain large integer literals)

The formatter could technically swallow the warnings and append u64 to all the large literals, which is actually what I did with the last commit here:

class Crystal::Formatter
  def visit(node : NumberLiteral)
    if @token.type.magic_line?
      write @token.type
      next_token
      return false
    end

    check :NUMBER
    write @token.raw
    if @token.number_kind.u64? && !@token.raw.ends_with?("u64") && !node.value.to_i64?
      write '_' if @token.raw.includes?('_')
      write "u64"
    end
    next_token

    false
  end
end

Some places like the compiler-rt specs add u64 to a lot of literals regardless of whether they actually require one, because they look better.