Add multiple Dockerfiles for various Gitea runner profiles and update host vars

ansible/files/dockerfiles/linux-runners/Dockerfile.infra-tools

@@ -0,0 +1,28 @@
+FROM local/gitea-runner-base:latest
+
+# infra-tools runner profile: Ansible and infrastructure automation tools.
+USER root
+RUN apk add --no-cache \
+		bash \
+		ca-certificates \
+		curl \
+		git \
+		jq \
+		make \
+		openssh-client \
+		python3 \
+		py3-pip \
+		rsync \
+		unzip \
+		yq \
+		zip && \
+		python3 -m venv /opt/infra-venv && \
+		/opt/infra-venv/bin/pip install --no-cache-dir \
+			ansible \
+			ansible-lint \
+			bcrypt \
+			fabric \
+			passlib \
+			pywinrm
+
+ENV PATH="/opt/infra-venv/bin:${PATH}"