fix(environment): Clone IDF release branches instead of downloading zip and then fastforward

[jakub-kocka]

When the selected IDF branch is the release one, perform git clone instead of downloading a zip archive and fast-forwarding to the latest commit

Releated

• based on the Mattermost discussion (mention in tracker)
• internal tracker: IDF-10228

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Tested

• online IDF Installer (GitHub, Gitee and JihuLab mirrors)
  • release branch (zip archive correctly NOT downloaded -> git clone performed)
  • master branch (zip archive correctly NOT downloaded -> git clone performed)
  • released IDF version (zip archive correctly downloaded)
• offline IDF Installer (working as usual without any issues)

[jakub-kocka]

FYI @leeebo

Honestly, I’m not entirely satisfied with this approach, but given the "feature freeze" (if I understood correctly) on the Windows IDF Installer, it seems like a reasonable compromise without requiring a more complex refactor.

That said, I’m open to any suggestions if you have a better approach in mind guys.

[jakub-kocka]

@igrr, thanks for the review! I have implemented the changes as you suggested so it should be ready to merge. I have tested the installer and it works as expected.

Unfortunately, I am not able to do the merge as we agreed without your re-review and approval since you are the maintainer and requested a change.