remove i386ancient and need at least debian stable to build

* Removed the i386ancient standalone tarball build for linux, which
  was increasingly unable to support new git-annex features.
* Removed support for building with ghc older than 9.0.2,
  and with older versions of haskell libraries than are in current Debian
  stable.
* stack.yaml: Update to lts-23.2.

Note that i386ancient was targeting linux 2.6.32, which has been EOL for
over 9 years now. Any old system still using such a kernel is certainly highly
insecure. And I suspect i386ancient had its own insecurities due to haskell
libraries and C libraries not having been updated.

standalone/linux/stack-i386ancient.yaml

@@ -1,45 +0,0 @@
-flags:
-  git-annex:
-    production: true
-    parallelbuild: true
-    assistant: true
-    pairing: true
-    torrentparser: true
-    magicmime: false
-    dbus: false
-    debuglocks: false
-    benchmark: false
-    crypton: false
-    servant: false
-packages:
-- '.'
-extra-deps:
-- IfElse-0.85
-- aws-0.22
-- bloomfilter-2.0.1.0
-- tasty-1.2
-- tasty-rerun-1.1.14
-- torrent-10000.1.1
-- sandi-0.5
-- filepath-bytestring-1.4.2.1.6
-- ansi-terminal-0.9.1
-- ansi-wl-pprint-0.6.9
-- concurrent-output-1.10.15
-- git-lfs-1.2.0
-- http-client-restricted-0.0.5
-- http-client-0.7.11
-- http-client-tls-0.3.6.1
-- http-conduit-2.3.8
-- network-3.0.1.0
-- network-bsd-2.8.1.0
-- dbus-1.2.4
-- simple-sendfile-0.2.30
-- network-multicast-0.3.2
-- socks-0.6.1
-- wai-extra-3.0.25
-- warp-3.2.26
-- connection-0.3.0
-- DAV-1.3.4
-explicit-setup-deps:
-  git-annex: true
-resolver: lts-12.14