MDEV-35512 remove RPM compat

RPM compat files aren't needed
anywhere anymore.

This will wait until MariaDB/server#3666
is merged up before merging into production.

The only that was using it, RHEL8 (not s390x),
was incorrect.

common_factories.py

@@ -606,22 +606,6 @@ def getRpmAutobakeFactory(mtrDbPool):
     f_rpm_autobake.workdir = (
         f_rpm_autobake.workdir + "/padding_for_CPACK_RPM_BUILD_SOURCE_DIRS_PREFIX/"
     )
-    f_rpm_autobake.addStep(
-        steps.ShellCommand(
-            name="fetch packages for MariaDB-compat",
-            command=[
-                "sh",
-                "-c",
-                util.Interpolate(
-                    'wget --no-check-certificate -cO ../MariaDB-shared-5.3.%(kw:arch)s.rpm "%(kw:url)s/helper_files/mariadb-shared-5.3-%(kw:arch)s.rpm" && wget -cO ../MariaDB-shared-10.1.%(kw:arch)s.rpm "%(kw:url)s/helper_files/mariadb-shared-10.1-kvm-rpm-%(kw:rpm_type)s-%(kw:arch)s.rpm"',
-                    arch=getArch,
-                    url=os.getenv("ARTIFACTS_URL", default="https://ci.mariadb.org"),
-                    rpm_type=util.Property("rpm_type"),
-                ),
-            ],
-            doStepIf=hasCompat,
-        )
-    )
     f_rpm_autobake.addStep(getSourceTarball())
     f_rpm_autobake.addStep(steps.ShellCommand(command="ls .."))
     # build steps

utils.py

@@ -472,28 +472,6 @@ def hasEco(props):
     return False
 
 
-def hasCompat(step):
-    builderName = str(step.getProperty("buildername"))
-
-    # For s390x and the listed distros there are no compat files
-    if any(
-        builderName.find(sub) != -1
-        for sub in {
-            "s390x",
-            "fedora",
-            "alma",
-            "rocky",
-            "openeuler",
-            "suse-15",
-            "sles-15",
-        }
-    ):
-        return False
-    if "rhel" in builderName or "centos" in builderName:
-        return step.getProperty("rpm_type")[-1] in ["7", "8"]
-    return True
-
-
 def hasDockerLibrary(step):
     # Can only build with a saved package
     if not savePackage(step):