WFLY-19161: add documentation for configuration file aliases

[michpetrov]

Issue: WFLY-19161

[bstansberry]

@michpetrov Adding this content in https://github.com/wildfly/wildfly/blob/main/docs/src/main/asciidoc/Getting_Started_Guide.adoc#starting-wildfly-with-an-alternate-configuration would be good too.

[darranl]

Adding 32.x as we need the doc in Final, not adding other labels as not strictly necessary for Beta.

[michpetrov]

@bstansberry I assume a link from that section to this one will do?

[bstansberry]

@bstansberry I assume a link from that section to this one will do?

OK, that works. That section doesn't list all the available files, so copying in this content that does list them all would be confusing.

[bstansberry]

Thanks @michpetrov!