SD-853 increase timeout

[hnnsgstfssn]

Calculating diffs on promotion pull requests like [1] fails since the context is timing out and processing is aborted. This is evident from logs.

    Error getting manifests for app ..., revision ...:
	rpc error: code = DeadlineExceeded desc = context deadline exceeded"
    Error generating diff for component ...:
	rpc error: code = DeadlineExceeded desc = context deadline exceeded"
    Handling of PR event failed: err=getting diff information:
	rpc error: code = DeadlineExceeded desc = context deadline exceeded\n" ...

Increasing the timeout is a short-term fix to mitigate the issue and allow users to get the diff while additional investigation is done to figure out how we can address this better long-term.

[1] https://github.com/commercetools/k8s-gitops/pull/998

Type of Change

• Bug Fix
• New Feature
• Breaking Change
• Refactor
• Documentation
• Other (please describe)

Checklist

• I have read the contributing guidelines
• Existing issues have been referenced (where applicable)
• I have verified this change is not present in other open pull requests
• Functionality is documented
• All code style checks pass
• New code contribution is covered by automated tests
• All new and existing tests pass

[yzdann]

I have no idea about the metrics, but I guess this increase won't lead to resource saturation as we wait longer now.

[hnnsgstfssn]

I have no idea about the metrics, but I guess this increase won't lead to resource saturation as we wait longer now.

There is this but yeah I don't know either. Given it's short-term and we're going to figure out how to better address it separately, maybe by increasing available resources, I say we go ahead. But good callout.