Upgrade ndc-spec to v0.1.1. (#390)

### What

This includes:

- type representations in the models
- upgrading the OpenTelemetry SDK
- adding a feature switch to support `rustls` instead of `native-tls`
- a lot of enhancements to ndc-test

ndc-sdk was upgraded in hasura/ndc-sdk-rs#1.

We do not actually specify type representations in this changeset. We
will add these in a follow-up change.

### How

I discovered we can specify workspace dependencies, which means the
versions only need to go in one place. I am experimenting with this
Cargo feature in this changeset. If we like it, we may want to use it
for all dependencies.

.github/workflows/cargo-test.yaml

@@ -5,6 +5,7 @@ name: Postgres NDC tests
 jobs:
   test-unit:
     strategy:
+      fail-fast: false
       matrix:
         package:
           - query-engine-execution
@@ -39,6 +40,7 @@ jobs:
 
   test-connector:
     strategy:
+      fail-fast: false
       matrix:
         package:
           - ndc-postgres-12
@@ -154,6 +156,7 @@ jobs:
 
   test-ndc-postgres-with-database:
     strategy:
+      fail-fast: false
       matrix:
         database:
           - postgres