Add local charm and bundle for the integration test

Author: cderici

tests/integration/bundle/local-manifest.yaml

@@ -0,0 +1,4 @@
+applications:
+  test1:
+    charm: "../charm-manifest"
+    num_units: 1

tests/integration/charm-manifest/config.yaml

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+options:
+  status:
+    type: string
+    default: "active"

tests/integration/charm-manifest/dispatch

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+#!/bin/bash
+
+status="$(config-get status)"
+
+if [[ "$status" == "error" ]]; then
+    if [[ -e .errored ]]; then
+        status="active"
+    else
+        touch .errored
+        exit 1
+    fi
+fi
+status-set "$status"

tests/integration/charm-manifest/manifest.yaml

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+analysis:
+  attributes:
+  - name: language
+    result: python
+  - name: framework
+    result: operator
+bases:
+- architectures:
+  - amd64
+  channel: '20.04'
+  name: ubuntu
+charmcraft-started-at: '2021-08-20T08:09:00.639806Z'
+charmcraft-version: 1.2.1

tests/integration/charm-manifest/metadata.yaml

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+name: charm
+summary: "test"
+description: "test"
+maintainers: ["test"]