Remove duplicate ara and ansible custom managers from renovate (#2453)

The dedicated custom managers for ara (pypi datasource) and
ansible (pypi datasource) predate the generic comment-based
regex manager introduced in commit 3b2aa9c. They were never
cleaned up during that refactoring.

Both entries now have inline "# renovate: datasource=..."
comments, so the generic manager handles them correctly. The
dedicated managers caused duplicate PRs (#2342 for ara, #2187
for ansible). Worse, the pypi datasource tracks Python package
releases independently from the Docker image builds, risking
updates to versions for which no container image exists yet.
The ansible manager also proposed major version bumps without
the corresponding ansible-core update, bypassing the grouping
and packageRules that restrict update types.

AI-assisted: Claude Code

Signed-off-by: Roger Luethi <luethi@osism.tech>

Author: ideaship

.github/renovate.json

@@ -4,26 +4,6 @@
     "github>osism/renovate-config:python"
   ],
   "customManagers": [
-    {
-      "customType": "regex",
-      "managerFilePatterns": [
-        "/^latest\\/base.yml$/"
-      ],
-      "matchStrings": [
-        "(?<depName>ansible)_version: '(?<currentValue>.*?)'"
-      ],
-      "datasourceTemplate": "pypi"
-    },
-    {
-      "customType": "regex",
-      "managerFilePatterns": [
-        "/^latest\\/base.yml$/"
-      ],
-      "matchStrings": [
-        "(?<depName>ara): '(?<currentValue>.*?)'"
-      ],
-      "datasourceTemplate": "pypi"
-    },
     {
       "customType": "regex",
       "managerFilePatterns": [