allow setting articletitle and chaptertitle per-entry

[rsekman]

articletitle and chaptertitle are not recognised when provided in an OPTIONS={...} field of an entry. This is because they are declared as BibliographyOptions only. Declaring them also as EntryOptions fixes the problem.

To test you can e.g. apply this diff

diff --git a/biblatex-phys.bib b/biblatex-phys.bib
index 6f0f9b5..2fe28c4 100644
--- a/biblatex-phys.bib
+++ b/biblatex-phys.bib
@@ -31,6 +31,7 @@
   pages       = {361-363},
   number      = {1},
   doi         = {10.1021/ja00001a054},
+  OPTIONS={articletitle=false}
 }
 
 @Patent{Arduengo2001,
@@ -223,6 +224,7 @@
   chapter     = {V.3.1.1},
   pages       = {2119--2140},
   location    = {New York},
+  OPTIONS={chaptertitle=false}
 }
 
 @Book{Heyn1986,```

[josephwright]

This would lead to an inconsistent bibliography: I'm wondering what the motivation is.

[rsekman]

This was prompted by preparing a publication list including some manuscripts in preparation. Including article titles for all references is not possible due to a page limit, but without its title an @Article for a manuscript in preparation formats with no useful information except the authors.