Refactor IsContainerNetworkMode into ParseContainerNetworkMode

[beena352]

Summary of the Pull Request

Replaces the IsContainerNetworkMode boolean helper with ParseContainerNetworkMode which returns the parsed target name directly. This eliminates duplicated prefix+substr+validate logic that was hand-rolled in multiple places.

PR Checklist

• Closes: Link to issue #xxx
• Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• Tests: Added/updated if needed and all pass
• Localization: All end user facing strings can be localized
• Dev docs: Added/updated if needed
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

This is a followup PR to #40601 addressing review comment to consolidate the container network mode parsing logic.
The container:<name|id> prefix parsing was done in two different ways:

• IsContainerNetworkMode() check followed by manual substr()
• Direct starts_with() + substr() without using the helper at all
  ParseContainerNetworkMode consolidates both patterns into a single function that returns std::optionalstd::string - the target name if the mode matches, std::nullopt otherwise. Two overloads are provided: one for LPCSTR (user-input paths) and one for std::string_view (Docker inspect recovery path).

Validation Steps Performed

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Refactors container network mode handling by replacing a boolean IsContainerNetworkMode helper with ParseContainerNetworkMode, which parses and returns the container target identifier as an std::optional<std::string>.

Changes:

• Added ParseContainerNetworkMode overloads for LPCSTR and std::string_view.
• Updated call sites to use the new parser and removed manual prefix/substr parsing.
• Switched container-mode checks in a few places from boolean helper usage to optional presence checks.

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 2 comments.

[kvega005]

LGTM