Fix addsTo.pack references

This change is a prerequisite for a CLI change where there will be
strict testing of the `addsTo.pack` values. It must resolve to a pack
reference that is a transitive dependency of the current query's pack.

java/ql/test/library-tests/dataflow/external-models/sinks.ext.yml

@@ -1,6 +1,6 @@
 extensions:
   - addsTo:
-      pack: codeql/java-tests
+      pack: codeql/java-all
       extensible: sinkModel
     data:
       - ["my.qltest", "B", False, "sink1", "(Object)", "", "Argument[0]", "qltest", "manual"]

java/ql/test/library-tests/dataflow/external-models/srcs.ext.yml

@@ -1,6 +1,6 @@
 extensions:
   - addsTo:
-      pack: codeql/java-tests
+      pack: codeql/java-all
       extensible: sourceModel
     data:
       - ["my.qltest", "A", False, "src1", "()", "", "ReturnValue", "qltest", "manual"]

java/ql/test/library-tests/dataflow/external-models/steps.ext.yml

@@ -1,6 +1,6 @@
 extensions:
   - addsTo:
-      pack: codeql/java-tests
+      pack: codeql/java-all
       extensible: summaryModel
     data:
       - ["my.qltest", "C", False, "stepArgRes", "(Object)", "", "Argument[0]", "ReturnValue", "taint", "manual"]