fix: use client path instead of certificate content as destination

The task importing the client certificate passed
`certificate_authority_client_tls_crt_content` to `dest`, so the PEM payload
itself was interpreted as a directory path. The certificate was written to a
bogus location derived from its own content instead of the configured client
directory. Use `certificate_authority_client_path` as destination, consistent
with the private key import above.

Co-authored-by: Copilot <copilot@github.com>

tasks/client_certificate_import.yaml

@@ -12,7 +12,7 @@
 - name: Import certificate of a client
   ansible.builtin.copy:
     content: "{{ certificate_authority_client_tls_crt_content }}"
-    dest: "{{ certificate_authority_client_tls_crt_content }}/cert.pem"
+    dest: "{{ certificate_authority_client_path }}/cert.pem"
     owner: "root"
     group: "root"
     mode: "0644"