(cloudfront): Name length of cache policy

### Describe the bug

When introducing an unnamed CachePolicy to a CloudFront distribution which is deeply nested in constructs the automatic generated name could grow beyond 128 characters, in spite of #18918 / #18953. This will cause the CDK to raise an exception

### Expected Behavior

CDK is able to figure out how to make a properly unique policy name without raising exceptions

### Current Behavior

CDK is unable to figure out how to make a properly unique policy name without raising exceptions.

In the reproduction case, the offending policy's id is a single character, which is still too long.

### Reproduction Steps

Attempt to synth the project that can be cloned from here: https://github.com/jnawk/cdk-cfront-policy-name-too-long

### Possible Solution

_No response_

### Additional Information/Context

_No response_

### CDK CLI Version

2.54.0

### Framework Version

2.54.0

### Node.js Version

16.18.1

### OS

Ubuntu 22.04.1 LTS

### Language

Typescript

### Language Version

TS4.9.4

### Other information

_No response_

Clone the linked reproduction project and run synth to observe the generated CachePolicy name failure. Trace how deeply nested unnamed CloudFront policies receive names; done means synthesis succeeds with a unique policy name no longer than 128 characters.

Written by the indexing model from the issue text.