fix: change folder prefix for adding headers (#2688)

In this PR:
- Change post processor to add header when the folder name starts with
`proto-` or `grpc-`.
- Change post processor to add pom.xml when the folder name starts with
`proto-` or `grpc-`.

Context: we received a library generation request which the library name
doesn't start with `google-` (b/329445405). The generated library has
two issues: 1) pom.xml is not generated in `proto-` folder; 2) files in
`proto-` folder have no header. This library uses REST so no `grpc-`
folder was generated.

library_generation/owlbot/src/fix-license-headers.py

@@ -21,10 +21,10 @@
 
 # Until the generator generates license headers on generated proto
 # classes, add the license headers in
-for path in glob.glob("proto-google-*"):
+for path in glob.glob("proto-*"):
     java.fix_proto_headers(root / path)
 
 # Until the generator generates license headers on generated grpc
 # classes, add the license headers in
-for path in glob.glob("grpc-google-*"):
+for path in glob.glob("grpc-*"):
     java.fix_grpc_headers(root / path, "unused")

library_generation/owlbot/src/fix-poms.py

@@ -383,7 +383,7 @@ def main(versions_file, monorepo):
     # Missing Case 2: There's a new proto-XXX and grpc-XXX directory. It's a new
     # version in the proto file to a library. Both a new library and existing
     # library.
-    for path in glob.glob("proto-google-*"):
+    for path in glob.glob("proto-*"):
         if not path in existing_modules:
             existing_modules[path] = module.Module(
                 group_id=__proto_group_id(group_id),
@@ -422,7 +422,7 @@ def main(versions_file, monorepo):
                     release_version=main_module.release_version,
                 )
 
-    for path in glob.glob("grpc-google-*"):
+    for path in glob.glob("grpc-*"):
         if not path in existing_modules:
             existing_modules[path] = module.Module(
                 group_id=__proto_group_id(group_id),