Update build packages repository

- Switch to Python3
- Switch to mawk instead of gawk
- Update ffmpeg (there are several new dependencies)
- Update ICU
- Fix various pre-existing problems with packages not being properly
  declared for gcc2 (but somehow it ended up working)
- remove curl, subversion, mercurial

Confirmed that both nightly and release images are building fine on both
32 and 64bit. However, non-x86 architecture may require re-bootstrapping
to do a complete nightly or release image build (the minimal profile
should be fine)

Fixes #16751.

Change-Id: Iacac92923c4113b3e0a49a64b0b4cc1b8e2f5e2e
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3871
Reviewed-by: Adrien Destugues <[email protected]>

Jamfile

@@ -20,25 +20,28 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 # Include required packages:
 # primary architecture
 AddHaikuImageSystemPackages [ FFilterByBuildFeatures
-	bash bc coreutils curl freetype icu libsolv zlib zstd
+	bash bc coreutils freetype libsolv zlib
 
+	!gcc2 @{ icu66 }@
+	gcc2 @{ icu icu66_x86@secondary_x86 }@
 	regular_image @{
-		bzip2 diffutils expat ffmpeg findutils gawk glu grep gutenprint8
-		gzip
+		bzip2 diffutils expat ffmpeg findutils glu gutenprint8 gzip
 		lame less libedit libicns
-		mesa mesa_devel mesa_swpipe@!gcc2 mesa_swrast@gcc2
+		mawk mesa mesa_devel mesa_swpipe@!gcc2 mesa_swrast@gcc2
 		netcat
 		sed sharutils
-		tar tcpdump unzip wget which zip
+		tcpdump unzip wget which zip
+
+		!gcc2 @{ grep tar zstd }@
+		gcc2 @{ grep_x86@secondary_x86 tar_x86@secondary_x86 }@
 	}@
 ] ;
 AddHaikuImageSourcePackages [ FFilterByBuildFeatures
 	bash bc coreutils
 
 	regular_image @{
-		expat ffmpeg findutils gawk grep gutenprint8
-		gzip
-		lame less libicns
+		expat ffmpeg findutils grep gutenprint8 gzip
+		lame less libicns mawk
 		sed sharutils
 		tar wget which
 	}@
@@ -54,7 +57,7 @@ if $(HAIKU_PACKAGING_ARCHS[2]) {
 			in [ MultiArchSubDirSetup $(HAIKU_PACKAGING_ARCHS[2-]) ] {
 		on $(architectureObject) {
 			AddHaikuImageSystemPackages [ FFilterByBuildFeatures
-				curl freetype icu libsolv zlib
+				freetype icu libsolv zlib
 
 				regular_image @{
 					ffmpeg glu jasper jpeg libicns libpng16 libwebp mesa