CI: migrate each workflow to use reusable workflow from dedicated repo

Migrate each workflow to use reusable workflow from dedicated repo to
skip pushing CI related commits to openwrt and better track versioning
of CI workflow.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

.github/workflows/coverity.yml

@@ -16,53 +16,4 @@ jobs:
       contents: read
       packages: read
       actions: write
-    uses: ./.github/workflows/build.yml
-    with:
-      container_name: toolchain
-      target: x86
-      subtarget: 64
-      build_full: true
-      include_feeds: true
-      use_ccache_cache: false
-      coverity_compiler_template_list: >-
-        x86_64-openwrt-linux-gcc
-        x86_64-openwrt-linux-musl-gcc
-      #  qosify fails to build with cov-build
-      coverity_check_packages: >-
-        cgi-io
-        dnsmasq
-        dropbear
-        firewall
-        fstools
-        fwtool
-        iwinfo
-        jsonfilter
-        libnl-tiny
-        libubox
-        mtd
-        netifd
-        odhcp6c
-        odhcpd
-        opkg
-        procd
-        relayd
-        rpcd
-        swconfig
-        ubox
-        ubus
-        ucert
-        uci
-        uclient
-        ucode
-        ugps
-        uhttpd
-        umbim
-        umdns
-        unetd
-        uqmi
-        urngd
-        usbmode
-        usign
-        usteer
-        ustp
-        ustream-ssl
+    uses: openwrt/actions-shared-workflows/.github/workflows/coverity.yml@main