…PI context provider (#211)

CDK app with CC API Context Provider fails if the resource we want to
get doesn't exist.

```
[Error at /LookupStack] Encountered CC API error while getting resource MyLookupTestRole. Error: ResourceNotFoundException: AWS::IAM::Role Handler returned status FAILED: The role with name MyLookupTestRole cannot be found. (Service: Iam, Status Code: 404, Request ID: xxxx-xxx-xxxx-xxxx) (HandlerErrorCode: NotFound, RequestToken: xxxx-xxx-xxxx-xxxx)
```

Also CC API Context Provider (`CcApiContextProviderPlugin`) cannot
ignore errors even if `ignoreErrorOnMissingContext` is passed in
aws-cdk-lib because the current code in aws-cdk-**cli** doesn't handle
the property.

Sample cdk-lib code (based on my
[PR](aws/aws-cdk#33603) for IAM Role
fromLookup):

```ts
    const response: {[key: string]: any}[] = ContextProvider.getValue(scope, {
      provider: cxschema.ContextProvider.CC_API_PROVIDER,
      props: {
        typeName: 'AWS::IAM::Role',
        exactIdentifier: options.roleName,
        propertiesToReturn: [
          'Arn',
        ],
      } as cxschema.CcApiContextQuery,
      dummyValue: [
        {
          // eslint-disable-next-line @cdklabs/no-literal-partition
          Arn: 'arn:aws:iam::123456789012:role/DUMMY_ARN',
        },
      ],
      ignoreErrorOnMissingContext: options.returnDummyRoleOnMissing, // added
    }).value;
```

However it would be good if the provider can ignore errors and return
any dummy value to cdk library. This allows all resources to be **used
if available, or created if not.**

Actually, SSM and KMS provider can ignore errors:

KMS:
https://github.com/aws/aws-cdk-cli/blob/main/packages/aws-cdk/lib/context-providers/keys.ts#L43-L48

SSM:
https://github.com/aws/aws-cdk-cli/blob/main/packages/aws-cdk/lib/context-providers/ssm-parameters.ts#L27-L30

For example, in cdk-lib, we can specify
[ignoreErrorOnMissingContext](https://github.com/aws/aws-cdk/blob/v2.182.0/packages/aws-cdk-lib/aws-kms/lib/key.ts#L741-L744)
in the `fromLookup`. The `dummyValue` and `ignoreErrorOnMissingContext`
properties can also be specified in
[GetContextValueOptions](https://github.com/go-to-k/aws-cdk/blob/45a276fd0fc9b7b08f69f7faf3d0091796ab1663/packages/aws-cdk-lib/core/lib/context-provider.ts#L31-L45).

## cli-integ

aws/aws-cdk-cli-testing#50

---
By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache-2.0 license

---------

Co-authored-by: Rico Hermans <rix0rrr@gmail.com>