- remove error details from the reports
- collapse flaky tests by default
- limit comment to 65365 character
GitHub API has comment length limit 65536 chars:
```
Unhandled error: HttpError: Validation Failed: {"resource":"IssueComment","code":"unprocessable","field":"data","message":"Body is too long (maximum is 65536 characters)"}
```
The credentials are created with
`az ad sp create-for-rbac --name "playwright-github-actions" --role
"Storage Blob Data Contributor" --scopes /subscriptions/<subscription
id>/resourceGroups/<resource
group>/providers/Microsoft.Storage/storageAccounts/<storage account>`
We cannot use `azure/login@v1` for login as it does not see to properly
propagate credentials to `azcopy` in the next step (there are some
reports about keyring problems on linux based actions).
Also:
- remove `blob-report` directory at the start;
- markdown's `report.md` next to package.json;
- use default location in playwright's workflows.
References #24451.
Since all resources are uploaded in the separate workflow anyway there
is not much point in passing the options and uploading blob reports as a
separate step.
* Fix report downloading from Azure (reports are now zipped)
* Extracted upload logic into an action
* Extracted PR number file generation into its own job
Fixes
```
Notice: Report url: https://mspwblobreport.z1.web.core.windows.net/run-5533005176-1-a0b0752662f8af5f841ff7a65b04d02066474ff2/index.html
ReferenceError: fs is not defined
at eval (eval at callAsyncFunction (/home/runner/work/_actions/actions/github-script/v6/dist/index.js:15143:16), <anonymous>:30:18)
at callAsyncFunction (/home/runner/work/_actions/actions/github-script/v6/dist/index.js:15144:12)
at main (/home/runner/work/_actions/actions/github-script/v6/dist/index.js:15236:26)
at /home/runner/work/_actions/actions/github-script/v6/dist/index.js:15217:1
at /home/runner/work/_actions/actions/github-script/v6/dist/index.js:15268:3
at Object.<anonymous> (/home/runner/work/_actions/actions/github-script/v6/dist/index.js:152[71](https://github.com/microsoft/playwright/actions/runs/5533535965/jobs/10097205178#step:12:72):12)
at Module._compile (node:internal/modules/cjs/loader:1105:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1159:10)
at Module.load (node:internal/modules/cjs/loader:981:32)
at Function.Module._load (node:internal/modules/cjs/loader:822:12)
```
