Add `APPLICATION_NAME` and `APPLICATION_GROUP` properties that contain
verbatim values rather than formatted strings. Formatting of the values
is now handled by new `EnclosedInSquareBracketsConverter` classes for
both Logback and Log4J2.
The existing `LOGGED_APPLICATION_NAME` variable is now considered
deprecated. The `LOGGED_APPLICATION_GROUP` variable and related
logback converter have been removed since they never made it to a GA
release.
Closes gh-41444
c3ad8b0521