Improve analyzer factoryies' Javadoc. [LUCENE-8873]

Currently, the documentation for analyzer factories (subclasses of `TokenizerFactory`, `CharFilterFactory`, `TokenFilterFactory`) still includes lots of Solr schema.xml examples and not all properties are documented. From my perspective, the latter is more problematic because users who want to use the factories have to refer to source code to know what properties are defined.

To improve documentation, XML examples should be removed for cleanup, and instead, **all properties which can be passed to factory constructors should be properly documented**.

Documentation is often overlooked so some validation rules and standardization effort would be desired (e.g. marking properties by annotations).

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Migrated from [LUCENE-8873](https://issues.apache.org/jira/browse/LUCENE-8873) by Tomoko Uchida (@mocobeta), updated Aug 12 2019
Linked issues:
- #9612

Start by locating the analyzer factory subclasses of TokenizerFactory, CharFilterFactory, and TokenFilterFactory, then review how their constructor properties are currently documented. Check the existing Javadocs and Solr schema.xml examples first. Done means removing the XML examples and documenting every constructor property, with any validation or annotation standardization agreed for the affected factories.

Written by the indexing model from the issue text.