[0.4.12][SETUPLIB][USETUP] Fix regression CORE-16274

Symptom 'USETUP detects active ext2 partition as raw and attempts to format'

It was a regression of 0.4.12-dev-835-g
c1fbc2d

We now let the user decide in terms of uncertainty (unrecognized FS'es)
This commit is a squashed backport of the following commits to master:

The essential parts of the fix 1 by Hermès Bélusca-Maïto
0.4.13-dev-997-g
626c654

The essential parts of the fix 2 by Hermès Bélusca-Maïto
0.4.13-dev-998-g
59acff7

A compilation fix on top contributed by Katayama Hirofumi MZ
0.4.13-dev-1000-g
bfea773

And because it made the backporting easier:
I also took a localization patch of B. George
0.4.13-dev-922-g
2fbff73

and an improvement from Oleg Dubinskiy
0.4.13-dev-714-g
6ee7cba

and a GCC8 fix of hpoussin
0.4.13-dev-275-g
6129fba

Author: JoachimHenze

base/setup/lib/errorcode.h

@@ -16,6 +16,9 @@ typedef enum _ERROR_NUMBER
 {
     NOT_AN_ERROR = 0,   // ERROR_SUCCESS,
     ERROR_NOT_INSTALLED,
+    ERROR_NO_BUILD_PATH,
+    ERROR_SOURCE_PATH,
+    ERROR_SOURCE_DIR,
     ERROR_NO_HDD,
     ERROR_NO_SOURCE_DRIVE,
     ERROR_LOAD_TXTSETUPSIF,