Investigate commented out tutorial validations

Many of the tutorial validations in the [GitHub validate_tutorials.yaml](https://github.com/dapr/quickstarts/blob/master/.github/workflows/validate_tutorials.yaml) file are commented out and thus not running.

```yaml
# - name: Validate distributed-calculator
# if: matrix.os == 'ubuntu-latest'
# run: |
# pushd tutorials/distributed-calculator
# make validate
# popd
# - name: Validate pub-sub
# if: matrix.os == 'ubuntu-latest'
# run: |
# pushd tutorials/pub-sub
# make validate
# popd
# - name: Validate bindings
# if: matrix.os == 'ubuntu-latest'
# run: |
# pushd tutorials/bindings
# make validate
# popd
# - name: Validate secretstore
# if: matrix.os == 'ubuntu-latest'
# run: |
# pushd tutorials/secretstore
# make validate
# popd
# - name: Validate observability
# if: matrix.os == 'ubuntu-latest'
# run: |
# pushd tutorials/observability
# make validate
# popd
```

I've tried to run the bindings and secretstore validations locally and they are failing.

I presume these validations have been commented out (temporarily) to get a green validation result.

I suggest we investigate why these validations are failing, and fix where possible.