Update debian build stages to use gpg over sq (nginx#5664)

Author: shaun-nx

build/Dockerfile

@@ -165,13 +165,13 @@ RUN --mount=type=secret,id=nginx-repo.crt,dst=/etc/ssl/nginx/nginx-repo.crt,mode
 	--mount=type=bind,from=nginx-files,src=90pkgs-nginx,target=/etc/apt/apt.conf.d/90pkgs-nginx \
 	--mount=type=bind,from=nginx-files,src=debian-plus-12.sources,target=/etc/apt/sources.list.d/nginx-plus.sources \
 	apt-get update \
-	&& apt-get install --no-install-recommends --no-install-suggests -y sq ca-certificates libcap2-bin libcurl4 \
+	&& apt-get install --no-install-recommends --no-install-suggests -y gpg ca-certificates libcap2-bin libcurl4 \
 	&& groupadd --system --gid 101 nginx \
 	&& useradd --system --gid nginx --no-create-home --home-dir /nonexistent --comment "nginx user" --shell /bin/false --uid 101 nginx \
-	&& sq dearmor -o /usr/share/keyrings/nginx-archive-keyring.gpg /tmp/nginx_signing.key \
+	&& gpg --dearmor -o /usr/share/keyrings/nginx-archive-keyring.gpg /tmp/nginx_signing.key \
 	&& apt-get update \
 	&& apt-get install --no-install-recommends --no-install-suggests -y nginx-plus nginx-plus-module-njs nginx-plus-module-opentracing nginx-plus-module-fips-check \
-	&& apt-get purge --auto-remove -y sq \
+	&& apt-get purge --auto-remove -y gpg \
 	&& cp -av /tmp/ot/usr/local/lib/libjaegertracing*so* /tmp/ot/usr/local/lib/libzipkin*so* /tmp/ot/usr/local/lib/libdd*so* /tmp/ot/usr/local/lib/libyaml*so* /usr/local/lib/ \
 	&& ldconfig \
 	&& rm -rf /var/lib/apt/lists/*
@@ -199,11 +199,11 @@ RUN --mount=type=secret,id=nginx-repo.crt,dst=/etc/ssl/nginx/nginx-repo.crt,mode
 	cp /tmp/app-protect-dos.sources /etc/apt/sources.list.d/app-protect-dos.sources; \
 	fi \
 	&& apt-get update \
-	&& apt-get install --no-install-recommends --no-install-suggests -y ca-certificates sq \
+	&& apt-get install --no-install-recommends --no-install-suggests -y ca-certificates gpg \
 	&& groupadd --system --gid 101 nginx \
 	&& useradd --system --gid nginx --no-create-home --home-dir /nonexistent --comment "nginx user" --shell /bin/false --uid 101 nginx \
-	&& sq dearmor -o /usr/share/keyrings/nginx-archive-keyring.gpg /tmp/nginx_signing.key \
-	&& sq dearmor -o /usr/share/keyrings/app-protect-archive-keyring.gpg /tmp/app-protect-security-updates.key \
+	&& gpg --dearmor -o /usr/share/keyrings/nginx-archive-keyring.gpg /tmp/nginx_signing.key \
+	&& gpg --dearmor -o /usr/share/keyrings/app-protect-archive-keyring.gpg /tmp/app-protect-security-updates.key \
 	&& apt-get update \
 	&& apt-get install --no-install-recommends --no-install-suggests -y nginx-plus nginx-plus-module-njs nginx-plus-module-opentracing nginx-plus-module-fips-check libcap2-bin libcurl4 \
 	## end of duplicated code
@@ -214,7 +214,7 @@ RUN --mount=type=secret,id=nginx-repo.crt,dst=/etc/ssl/nginx/nginx-repo.crt,mode
 	&& if [ -z "${NAP_MODULES##*dos*}" ]; then \
 	apt-get install --no-install-recommends --no-install-suggests -y app-protect-dos; \
 	fi \
-	&& apt-get purge --auto-remove -y sq \
+	&& apt-get purge --auto-remove -y gpg \
 	## the code below is duplicated from the debian-plus image because NAP doesn't support debian 12
 	&& cp -av /tmp/ot/usr/local/lib/libjaegertracing*so* /tmp/ot/usr/local/lib/libzipkin*so* /tmp/ot/usr/local/lib/libdd*so* /tmp/ot/usr/local/lib/libyaml*so* /usr/local/lib/ \
 	&& ldconfig \