chore: Stop whinging about this ownership stuff. (#2775)

Stop clangd from squiggling every time we use new.
I don't think we're honouring whatever rule it's trying to make us
follow?

barretenberg/cpp/.clangd

@@ -1,4 +1,4 @@
-CompileFlags:                     # Tweak the parse settings
+CompileFlags: # Tweak the parse settings
   Remove: -fconstexpr-ops-limit=*
 ---
 # Applies all barretenberg source files
@@ -42,7 +42,7 @@ Diagnostics:
       - misc-non-private-member-variables-in-classes
       - cppcoreguidelines-non-private-member-variables-in-classes
       # We have many `for` loops that violate this part of the bounds safety profile
-      - cppcoreguidelines-pro-bounds-constant-array-index 
+      - cppcoreguidelines-pro-bounds-constant-array-index
       # Large diff; we often `use` an entire namespace.
       - google-build-using-namespace
       # Large diff
@@ -59,6 +59,8 @@ Diagnostics:
       - readability-function-cognitive-complexity
       # It is often nicer to not be explicit
       - google-explicit-constructor
+      # Not honouring.
+      - cppcoreguidelines-owning-memory
 
 --- # this divider is necessary
 # Disable some checks for Google Test/Bench
@@ -69,5 +71,4 @@ Diagnostics:
     # these checks get triggered by the Google macros
     Remove:
       - cppcoreguidelines-avoid-non-const-global-variables
-      - cppcoreguidelines-owning-memory
-      - cppcoreguidelines-special-member-functions
+      - cppcoreguidelines-special-member-functions