Always stringify collection requirement versions

Before this change, whenever a numeric version was specified in
`requirements.yml`, the YAML parser would read it as `int` or `float`
which would leak straight down into the dependency resolver. This
patch makes an unconditional conversion of that data into `str`
right before constructing `Requirement` objects.

Fixes #79109
Fixes #78067

lib/ansible/galaxy/dependency_resolution/dataclasses.py

@@ -310,6 +310,8 @@ class _ComputedReqKindsMixin:
     def from_requirement_dict(cls, collection_req, art_mgr, validate_signature_options=True):
         req_name = collection_req.get('name', None)
         req_version = collection_req.get('version', '*')
+        if req_version is not None:
+            req_version = str(req_version)
         req_type = collection_req.get('type')
         # TODO: decide how to deprecate the old src API behavior
         req_source = collection_req.get('source', None)