Fix patch generation for module() calls missing version or using 0.0.0

[Copilot]

Two related bugs caused the patch generator to produce wrong or crashing results when a module() call omitted version=/compatibility_level=, or when the release version was 0.0.0.

Root Causes

Wrong attribute patched (PR #326 regression)
parse_MODULE_file_content used a global version= regex that matched the first occurrence in the file. When module() had no version= attribute, the regex hit a bazel_dep() version instead — producing a patch that rewrote the wrong line:

-bazel_dep(name = "platforms", version = "1.0.0")
+bazel_dep(name = "platforms", version = "0.1.4")   # wrong!

AssertionError on None comparison
Version.__eq__ asserted isinstance(other, Version), crashing when mod_file.version is None was compared against a release Version.

Spurious patch for 0.0.0 with no compatibility_level
Bazel defaults compatibility_level to 0. When a module omitted it and the release had major version 0, 0 == None evaluated False, triggering an unnecessary (and potentially empty) patch.

Changes

• version.py — Version.__eq__ returns NotImplemented for non-Version operands instead of asserting.
• bazel_wrapper.py — parse_MODULE_file_content — Scopes version= and compatibility_level= extraction to the module(…) call only (DOTALL for multiline support).
• bazel_wrapper.py — _create_patch_for_module_version_if_mismatch — Rewritten to:
  • Add version = "x.y.z" to module() when absent, rather than replacing an unrelated attribute.
  • Add compatibility_level = N when absent and release major > 0.
  • Treat absent compatibility_level as 0 (Bazel default) when deciding whether a patch is needed.
• tests/conftest.py — make_update_info accepts an optional module_content override for custom fixture content.
• New tests — Cover Version.__eq__ with None, parse scoping (ignoring bazel_dep versions, multiline calls, zero version), and all new patch scenarios (missing version with 0.x.y release, missing version with major > 0, 0.0.0 with no compatibility_level).

Original prompt

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This section details on the original issue you should resolve

<issue_title>Bug in patch functionality</issue_title>
<issue_description>Seems like the patch functionality has a bug see example: #326

The script shall handle "0.0.0" and no version at all.

• extend script
• add appropriate tests
• adjust documentation</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Bug in patch functionality #328

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