chore(macros/Firefox_for_developers): remove the parameter and add zh-CN translation

[yin1999]

Summary

1. Added zh-CN translation for this macro.
2. Removed the usage of "version" param, as this is not really necessary (we can infer the version information from the slug).

Solution

Gather the version info from the slug.

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Screenshots

URL	Before	After
/en-US/docs/Mozilla/Firefox/Releases/2
/en-US/docs/Mozilla/Firefox/Releases/3.6
/en-US/docs/Mozilla/Firefox/Releases/4
/en-US/docs/Mozilla/Firefox/Releases/24
/en-US/docs/Mozilla/Firefox/Releases/121

Note, the lists in /en-US/docs/Mozilla/Firefox/Releases/2 are not consistent.

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How did you test this change?

1. Run yarn dev and check rendered page
2. Run rg -il "Firefox_for_developers" to check the occurrences of this macro in content and translated-content.

[yin1999]

/cc @jasonren0403. Please check the zh-CN translation in this PR. I've posted this in the Telegram group before.

[jasonren0403]

LGTM for zh-CN translation 👍

[yin1999]

ping @bsmth for another eye on this PR :)

[bsmth]

Looks way more readable to me, thank you! Leaving it for other expert eyes to take a look before merging 👀

edit 30th Nov: I'll ask engineering about this one today, thanks for the patience 🙏🏻

[bsmth]

(Quick update) - The engineering team know about this one and will get around to it soon, hopefully. 🙏🏻

[fiji-flo]

Sorry for the long delay and thanks a for cleaning this up.

[yin1999]

Thanks for the review @fiji-flo. Is there any thing blocking this?

[fiji-flo]

@yin1999 just didn't press the button

[hamishwillee]

FWIW Why do we show the "older versions" rather than "all versions". On release of a new version there is no difference. Later on when version "x" is old, I am unlikely to care about version x-1, but I might well care about the current version.