Fix patch commands when git config has color=always

[matthijskooijman]

This is the same option as used by pkg.commands.git_commands.diff.GetDiff().

This fixes some operations patch operation (tested with moving patch to another commit) with git config set --global color.ui always (or color.diff always).

Please check if the PR fulfills these requirements

• Cheatsheets are up-to-date (run go generate ./...) <-- N/A
• Code has been formatted (see here)
• Tests have been added/updated (see here for the integration test guide) <-- No existing tests for this code
• Text is internationalised (see here) <-- N/A
• If a new UserConfig entry was added, make sure it can be hot-reloaded (see here) <-- N/A
• Docs have been updated if necessary <-- N/A
• You've read through your own file changes for silly mistakes etc

[themavik]

Patch parsing assumes plain diff text; forcing --no-color beside --no-ext-diff stops ANSI escapes when color=always is set globally.