Update default pipeline when inputs are renamed or deleted

[patrickmann]

/nocl new feature
Resolves Graylog2/graylog-plugin-enterprise/issues/9591

See related issue for details

• Auto-rename input routing rule when input name changes; also update the default pipeline reference to the rule.
• Auto-delete routing rules when a corresponding input is deleted

We also change the pattern for generated rule names to include the human readable input title while retaining the input ID for uniqueness.

How Has This Been Tested?

Unit tests and local ad hoc testing:

• create inputs with routing
• rename inputs
• delete inputs
• use names that are substrings of other names
• duplicate input names

[AntonEbel]

A stream can also be renamed. Did you plan to implement the handling of stream renaming in another PR, or is it easier to implement it in this one?

[AntonEbel]

Adding @ExtendWith(MockitoExtension.class) would detect unnecessary stubbing.

[patrickmann]

Good catch. I expected the compiler or Sonar linter to alert me, but they didn't.
Strangely, adding the ExtendWith statement did not result in unused stubs being flagged; neither did adding the STRICT_SUBS setting.

[AntonEbel]

Sorry, I didn't mean that there is currently unnecessary stubbing in the test class. I just wanted to point out that it is always good to have this annotation so that Mockito can recognize unnecessary stubbing.

[patrickmann]

A stream can also be renamed. Did you plan to implement the handling of stream renaming in another PR, or is it easier to implement it in this one?

Confirmed with @tellistone that we are not auto-updating rules for stream rename/delete. Users will have to manually delete obsolete rules.