Teams/integration tests

[mszostok]

Description

Changes proposed in this pull request:

• Teams integration tests
• Fix Teams' SendMessageToAll fn: https://github.com/kubeshop/botkube/pull/1361/files#diff-a9f0c7bc7b088492810cc5f07cf8e2065acc85a188440c1fa84f12847963862fR124
• introduce dedicated go.mod for e2e tests and use botkube-cloud as private dependency.
• Setup pipelines with dedicated GCP service account to access Pub/Sub and GH PAT to download private go module

Follow-up issues

• https://github.com/kubeshop/botkube-cloud/issues/841
• https://github.com/kubeshop/botkube-cloud/issues/752
• https://github.com/kubeshop/botkube-cloud/issues/854
• https://github.com/kubeshop/botkube-cloud/issues/858

Testing

Overall testing approach:

• events are sent directly to Pub/Sub as we are not able to ping bot
• we sent a plaintext message to keep the conversation readable and inform what command was published into pub/sub
• message assertion:
  • when we detect html msg we convert that to markdown and do use strings comparison
  • If attachment is sent, we render expected message into Adaptive Cards format and jsondiff library
  • If we assert a plaintext, we check if it is a message may contain a filter. If so, they are split into 2, and we need to fetch two last messages to get the "body".

Verified by CI:

• slack: https://github.com/kubeshop/botkube/actions/runs/7700270702/job/20984745055?pr=1361
• discord: https://github.com/kubeshop/botkube/actions/runs/7700270702/job/20984745350?pr=1361
• teams: https://github.com/kubeshop/botkube/actions/runs/7700270702/job/20984745620?pr=1361

another run but without first restart in Teams platform:

• https://github.com/kubeshop/botkube/actions/runs/7709372855/job/21010453389

Related issue(s)

• https://github.com/kubeshop/botkube-cloud/issues/728
• https://github.com/kubeshop/botkube-cloud/pull/845

[pkosiec]

Awesome work 🚀 Just some small comments.