Remove scenario and object override strings

[AaronVanGeffen]

Ties in with OpenRCT2/OpenRCT2#23070. These overrides have been replaced with objects. (cf. OpenRCT2/objects#350).

[Gymnasiast]

As it turns out, the object overrides have been non-functional since the summer of 2023. Could you remove these as well? In a separate commit, so that we can easily find them back.

[github-actions]

Check results

For details go to Translation Check -> Details. Expand Run checks build stage and use the build-in search to find your language (e.g. pl-PL)

	Missing The translation is not added to translation file. (e.g. STR_9999 is in en-GB but is not available in given language)	Not needed The translation file contains entries that are not in en-GB and should be removed (e.g. STR_9999 exists in given language but is not in en-GB)	Same The translation and source string is exactly the same. (e.g. STR_9999 is Umbrella in both en-GB and given language). This may be desired in some cases (e.g. April is the same in English and German)
ar-EG	669 (+489)	1 (-1)	1765 (-139)
ca-ES	536 (+489)	0 (-1)	84 (-39)
cs-CZ	673 (+174)	0	140 (-108)
da-DK	578 (+489)	0	239 (-325)
de-DE	489 (+489)	0 (-1)	142 (-220)
en-US	3890 (+429)	0	1 (-391)
eo-ZZ	489 (+489)	0 (-1)	65 (-29)
es-ES	524 (+489)	0 (-1)	160 (-148)
fi-FI	489 (+489)	0 (-1)	97 (-25)
fr-FR	538 (+489)	0 (-1)	135 (-33)
hu-HU	489 (+489)	0	87 (-39)
it-IT	526 (+486)	0 (-1)	131 (-217)
ja-JP	489 (+429)	0 (-1)	122 (-214)
ko-KR	489 (+489)	0 (-1)	89 (-110)
nb-NO	578 (+489)	0	164 (-319)
nl-NL	489 (+489)	0 (-13)	175 (-309)
pl-PL	689 (+432)	0 (-1)	131 (-277)
pt-BR	489 (+489)	0 (-1)	133 (-21)
ru-RU	1592 (+171)	0	65 (-46)
sv-SE	543 (+432)	0 (-1)	151 (-205)
tr-TR	907 (+429)	0 (-1)	98 (-284)
uk-UA	573 (+474)	33 (-1)	726 (-411)
vi-VN	769 (+432)	2 (-1)	2788 (-431)
zh-CN	553 (+489)	0 (-1)	30 (-5)
zh-TW	664 (+432)	0	105 (-228)

Other translations

	Missing The translation is not added to translation file. (e.g. STR_9999 is in en-GB but is not available in given language)	Not needed The translation file contains entries that are not in en-GB and should be removed (e.g. STR_9999 exists in given language but is not in en-GB)	Same The translation and source string is exactly the same. (e.g. STR_9999 is Umbrella in both en-GB and given language). This may be desired in some cases (e.g. April is the same in English and German)
fr-CA	4046	0	0

[tupaschoal]

https://github.com/OpenRCT2/Localisation/blob/master/.github/workflows/translation_check.py can now be simplified

[Gymnasiast]

@tupaschoal #2958