Handle removal of ObjcProvider.direct_headers

Handle bazelbuild/bazel#14559 (bazelbuild/bazel@8a2b711) to prepare for Bazel 6.0.0.

rules/framework.bzl

@@ -320,16 +320,15 @@ def _get_framework_files(ctx, deps):
                 private_header_out.append(destination)
 
         has_header = False
-        for provider in [CcInfo, apple_common.Objc]:
-            if provider in dep:
-                for hdr in _get_direct_public_headers(provider, dep):
-                    if hdr.path.endswith((".h", ".hh", ".hpp")):
-                        has_header = True
-                        header_in.append(hdr)
-                        destination = paths.join(framework_dir, "Headers", hdr.basename)
-                        header_out.append(destination)
-                    elif hdr.path.endswith(".modulemap"):
-                        modulemap_in = hdr
+        if CcInfo in dep:
+            for hdr in _get_direct_public_headers(provider, dep):
+                if hdr.path.endswith((".h", ".hh", ".hpp")):
+                    has_header = True
+                    header_in.append(hdr)
+                    destination = paths.join(framework_dir, "Headers", hdr.basename)
+                    header_out.append(destination)
+                elif hdr.path.endswith(".modulemap"):
+                    modulemap_in = hdr
 
         if not has_header:
             # only thing is the generated module map -- we don't want it
@@ -409,10 +408,8 @@ def _get_direct_public_headers(provider, dep):
         if PrivateHeadersInfo in dep:
             return []
         return dep[provider].compilation_context.direct_public_headers
-    elif provider == apple_common.Objc:
-        return dep[provider].direct_headers
     else:
-        fail("Unknown provider " + provider + " only CcInfo and Objc supported")
+        fail("Unknown provider " + provider + " only CcInfo supported")
 
 def _get_symlinked_framework_clean_action(ctx, framework_files, compilation_context_fields):
     framework_name = ctx.attr.framework_name