chore: exclude libdatadog from ADMS auto generated PRs for dependency updates (#1688)

# What does this PR do?

ADMS opens auto-generated PRs to update dependencies. None of the PRs properly compile. Rust is not listed as officially supported. The common components team monitors dependabot issues for security updates. These PRs just create noise and unnecessary work. 

examples: 

#1665 
#1666
#1667
#1668
#1669
#1670
#1671
#1672
#1673
#1674 

# Motivation

What inspired you to submit this pull request?

# Additional Notes

Anything else we should know when reviewing?

# How to test the change?

Describe here in detail how the change can be validated.


Co-authored-by: edmund.kump <edmund.kump@datadoghq.com>

Author: ekump

repository.datadog.yml

@@ -14,3 +14,9 @@ rules:
   - require: commit-signatures
     excluded_emails:
       - '200755185+dd-octo-sts[bot]@users.noreply.github.com' # version-bump bots
+---
+schema-version: v2
+kind: adms
+auto-version-updates:
+  disabled:
+    reason: Auto-generated PRs fail to compile on Rust. Dependency updates must be deliberate. We already monitor dependabot for security updates.