[BACKPORT 2.20.2] [#21236] DocDB: Fix RPATH issue with OpenLDAP libra…

…ries for native glibc x86_64 build

Summary:
We were not setting RPATH correctly for a few OpenLDAP libraries because the executable bit was not set on them.  As a result, either system versions of those libraries would be picked up, or they would not be found at all.

Also refactoring library_packager.py:
- Use an enum for dependency categories.
- Reduce verbose logging when setting RPATHs.

Original commit: d893bb7  / D29140
Jira: DB-10161

Test Plan:
Jenkins: compile only

Manual testing:

```
./yb_build.sh release --no-tests --sj
./yb_release --skip_yugabyted_ui --force --no_reinitdb --skip_build --verbose |& tee ~/yb_release.log
cd build
tar xzf yugabyte-2.20.2.0-*-release-clang16-centos-*.tar.gz
cd yugabyte-2.20.2.0
bin/post_install.sh  # Only on x86_64.
ldd postgres/bin/postgres | grep ldap
ldd postgres/bin/initdb | grep ldap
```

Make sure that ldd output of the above only references Linuxbrew glibc libraries, and the libldap/liblber libraries are linked from the yb-thirdparty directory.

Repeat the test in an AlmaLinux 8 Docker container on both x86_64 (with Linuxbrew) and aarch64 (without Linuxbrew).

bin/run_codecheck

Reviewers: steve.varnau

Reviewed By: steve.varnau

Subscribers: ybase

Tags: #jenkins-ready

Differential Revision: https://phorge.dev.yugabyte.com/D32740

python/yugabyte/file_util.py

@@ -74,3 +74,15 @@ def compute_file_sha256(file_path: str) -> str:
                 break
             sha256.update(data)
     return sha256.hexdigest()
+
+
+def clean_path_join(base_path: str, rel_path: str) -> str:
+    """
+    >>> clean_path_join('foo', 'bar')
+    'foo/bar'
+    >>> clean_path_join('foo', '.')
+    'foo'
+    """
+    if rel_path == '.':
+        return base_path
+    return os.path.join(base_path, rel_path)