QA: strip redundant public-API EI ignores (SciMLTesting 1.7)

SciMLTesting 1.7 runs the two public-API ExplicitImports checks
(check_all_qualified_accesses_are_public / check_all_explicit_imports_are_public)
only on Julia >= 1.11, and the base-lib make-public releases (ModelingToolkit
11.29, Symbolics 7.28+, SymbolicUtils 4.36, SciMLBase 3.24) marked most of the
previously-ignored names public.

Verified against registered releases on Julia 1.12: of the 13
all_qualified_accesses_are_public ignores, only :topsort_equations (still
non-public in ModelingToolkit) and :getname (re-exported by Symbolics from
SymbolicIndexingInterface, non-public) remain flagged. The other 11 are now
public and removed. QA group passes 17/17 on 1.12 and 15/15 on 1.10 (public
checks skipped on the LTS). The all_qualified_accesses_via_owners list is a
distinct (non public-API) check and is left untouched.

Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: ChrisRackauckas

test/qa/qa.jl

@@ -27,12 +27,9 @@ run_qa(
         all_qualified_accesses_are_public = (;
             ignore = (
                 # not public in ModelingToolkit
-                :get_eqs, :get_initial_conditions, :get_iv, :get_observed,
-                :get_unknowns, :get_var_to_name, :topsort_equations,
-                # not public in Symbolics
-                :getname, :scalarize, :unwrap, :value,
-                # not public in SymbolicUtils
-                :isadd, :ismul,
+                :topsort_equations,
+                # not public in Symbolics (re-exported from SymbolicIndexingInterface)
+                :getname,
             ),
         ),
     )