WIP ci: Enable native ARM64 jobs

Author: real-or-random

.cirrus.yml

@@ -167,14 +167,13 @@ task:
   << : *CAT_LOGS
 
 task:
-  name: "ARM32: Linux (Debian stable, QEMU)"
-  container:
+  name: "ARM32: Linux (Debian stable)"
+  arm_container:
     << : *LINUX_CONTAINER
   env:
-    WRAPPER_CMD: qemu-arm
-    SECP256K1_TEST_ITERS: 16
     HOST: arm-linux-gnueabihf
     WITH_VALGRIND: no
+    WIDEMUL: int64
     ECDH: yes
     RECOVERY: yes
     SCHNORRSIG: yes
@@ -189,12 +188,10 @@ task:
   << : *CAT_LOGS
 
 task:
-  name: "ARM64: Linux (Debian stable, QEMU)"
-  container:
+  name: "ARM64: Linux (Debian stable)"
+  arm_container:
     << : *LINUX_CONTAINER
   env:
-    WRAPPER_CMD: qemu-aarch64
-    SECP256K1_TEST_ITERS: 16
     HOST: aarch64-linux-gnu
     WITH_VALGRIND: no
     ECDH: yes

ci/linux-debian.Dockerfile

@@ -16,7 +16,6 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
         gcc-i686-linux-gnu libc6-dev-i386-cross libc6-dbg:i386 libubsan1:i386 libasan8:i386 \
         gcc-s390x-linux-gnu libc6-dev-s390x-cross libc6-dbg:s390x \
         gcc-arm-linux-gnueabihf libc6-dev-armhf-cross libc6-dbg:armhf \
-        gcc-aarch64-linux-gnu libc6-dev-arm64-cross libc6-dbg:arm64 \
         gcc-powerpc64le-linux-gnu libc6-dev-ppc64el-cross libc6-dbg:ppc64el \
         gcc-mingw-w64-x86-64-win32 wine64 wine \
         gcc-mingw-w64-i686-win32 wine32 \