Introduce support for converting from a URI of the form method:<FQMN> to a MethodSource

[ielatif]

Overview

Introduce support for converting from a URI of the form method:<FQMN> to a MethodSource, where FQMN is the fully qualified method name. See the Javadoc for DiscoverySelectors.selectMethod(String) for the supported formats for a FQMN.

See #1850 for details

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Definition of Done

• There are no TODOs left in the code
• Method preconditions are checked and documented in the method's Javadoc
• Coding conventions (e.g. for logging) have been followed
• Change is covered by automated tests including corner cases, errors, and exception handling
• Public API has Javadoc and @API annotations
• Change is documented in the User Guide and Release Notes
• All continuous integration builds pass

[ielatif]

@marcphilipp @sbrannen any guidelines or starting point for updating the User Guide please?

[marcphilipp]

@ielatif Looks like we currently don't have any documentation for test source URIs for dynamic tests. I think a new subsection after 2.17.1. Dynamic Test Examples would make sense. I'd like to merge this PR first, though, so we can include it in 5.5 RC1 and add the documentation for 5.5 GA.

[marcphilipp]

@ielatif Thanks for your contribution! 👍 I've created #1903 to address the documentation in case you're interested. 😉

[ielatif]

@marcphilipp I would be happy to 😊

[sbrannen]

+1 -- thanks for the contribution!