feat(batect): Automatically extract dependencies for files included into Batect configuration

[charleskorn]

Changes:

This PR adds support for automatically identifying and updating dependencies in files included into the main batect.yml or batect-bundle.yml file without requiring them to be configured with fileMatch.

Context:

Batect supports including configuration from other files into the main configuration file, for example:

include:
  - include.yml
  - subdir/file.yml

  - type: file
    path: another-include.yml

Without this PR, a user would need to configure the batect manager's fileMatch to include the included files (eg. include.yml, subdir/file.yml and another-include.yml). This PR adds support for automatically discovering these includes, provided the main configuration file is covered by fileMatch.

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please tick one)

I have verified these changes via:

• Code inspection only, or
• Newly added unit tests, or
• Unit tests + ran on a real repository

This change can be tested against https://github.com/charleskorn/golang-bundle - Renovate should identify the bundle references in include.yml without configuring Renovate to check include.yml specifically.

[viceice]

Needs snapshot update.

[viceice]

Looks good so far, just some small suggestions.

[renovate-release]

🎉 This PR is included in version 24.10.0 🎉

The release is available on:

• GitHub release
• 24.10.0

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