Skip @type inside docblock description in TypeToVarTagFixer

[TomasVotruba]

TypeToVarTagFixer replaced @type anywhere in a comment, including description text, e.g. in Symfony config reference array shapes:

- *         include_type?: bool|Param, // Always include @type in updates (including delete ones). // Default: false
+ *         include_type?: bool|Param, // Always include @var in updates (including delete ones). // Default: false

Now only @type at the start of a doc line is converted. Added a skip fixture.