- rc.getToolCache(ctx) is used to figure out RUNNER_TOOL_CACHE and returns RUNNER_TOOL_CACHE if it is found in the runner config, e.g.
```yaml
container:
env:
RUNNER_TOOL_CACHE: /srv/toolcache
```
- store the value in the new `toolCache` data member for containers, in the same way it is done for host
- GetRunnerContext for containers return `toolCache` instead of a hard coded string
- add integration test
Closesforgejo/runner#184
Reviewed-on: https://code.forgejo.org/forgejo/act/pulls/178
Reviewed-by: Michael Kriese <michael.kriese@gmx.de>
Co-authored-by: Earl Warren <contact@earl-warren.org>
Co-committed-by: Earl Warren <contact@earl-warren.org>